AUTOMATICALLY PREVENTS ALL FORMS OF GRIEF, including build/break, theft, spam, fire, spawn camping, lava dumping, chat trolling, advertising and more, so you don’t have to undo any damage after the fact. It even teaches players how to use it so you don’t have to! No configuration or database required. Stop responding to grief and prevent it instead. Grief Prevention will solve your grief problems without requiring you to manage a roster of trained administrators, juggle 10 different anti-grief plugins, take away cool standard game features, publish a training manual / tutorial for players, or add explanatory signs to your world. You can also choose to integrate PvP elements into build design to finally get a PvP experience befitting a sandbox game about creative building.
Grief Prevention stops grief before it starts automatically without any effort from administrators, and with very little (self service) effort from players. Solve all your grief problems with a single download, no database, and no configuration step.
Official Servers (Try it for yourself!)
You can experience this plugin for yourself (as a player) by joining this public server. 
I maintain this server personally, which helps me catch bugs and spot opportunities for new features and improvements. Have fun!
BeardCraft bit.ly/beardcraftfb
Downloads by Minecraft Version
Please choose the version that matches your Minecraft server version!
GriefPrevention for Minecraft 1.8.*
GriefPrevention for Minecraft 1.7.10
GriefPrevention for all other versions
The Manual
Setup and Configuration
How To Guide for Administrators
Command and Permissions Reference
Extension Plugins
PvP Protection and Optional Siege PvP Mode
How Anti-Spam Works
Feature List
Yes, everything is customizable. See Setup and Configuration.
No database or world backups required.
Extremely efficient CPU / RAM usage.
Land claims are easy to manage.
Players create and manage their own land claims, so you don’t have to do it for them.
New players get automatic claims around their first chests so they’re protected even if they don’t know how to create land claims yet.
Players who ask for help in chat get an instant link to a demonstration video.
Resizing claims and creating new claims is done with ONLY the mouse, no slash commands (slash commands are also available).
When a player appears to be building something nice outside his claim, he’s warned and shown his claim boundaries.
Claim boundaries are easy to see, and don’t require any client-side mod installation.
Extremely easy-to-remember, single-parameter slash commands for giving other players permissions.
Claim subdivision and granular permissions are available to organize towns and cities. Watch this video.
It’s IMPOSSIBLE to grief a land claim. Watch this video.
No building or breaking.
No stealing from ANY containers.
No sleeping in beds.
No button/lever usage.
No adjusting redstone repeaters or other configurable blocks.
No pushing blocks in with pistons.
No pulling blocks out with pistons.
No TNT damage (including cannons).
No creeper damage.
No explosive damage from other plugins, like Extra Hard Mode or Magic Spells.
No enderman/silverfish block changes.
All doors may be automatically locked (optional, see config file).
No killing or luring animals away.
No stealing water (e.g. buckets).
No trampling crops by players, animals, or monsters.
No building overtop, all claims reach to the max build height.
No placing or breaking paintings / item frames / armor stands, etc.
Fluids will not flow into a claim from outside.
No placing blocks via TNT/Sand/Gravel cannon.
Pets and death loot are protected.
Players can’t pick up what another player dropped on death without permission.
All types of pets are protected everywhere, even outside of land claims (can be configured per-world).
Excellent anti-spam protection
Warns, then mutes, then may kick or ban spammers (configurable – you choose).
Most spammers get only one message out before they’re muted.
Blocks server advertising (IP addresses).
Blocks repeat message spam.
Blocks ASCII art (ex. Nyan Cats) spam.
Blocks similar message spam.
Blocks unreadable (gibberish) message spam.
Blocks CAPS.
Blocks macro spam (very different messages in quick succession).
Blocks login/logout spam, even when the spammer has multiple accounts.
Blocks death spam.
Blocks bot team spam.
Blocks slash command spam, including /tell, /emote, and any more you add.
Wilderness Protection and Rollback
Fire doesn’t spread or destroy blocks.
Creepers and other explosions don’t destroy blocks above sea level.
TNT doesn’t destroy blocks above sea level.
No planting trees on platforms in the sky (“tree grief”).
Instant, point and click nature restoration for not-claimed areas. Watch this video.
Insanely easy and fast fixes for penises, swastikas, and anything else unsightly.
Point at what you don’t like and click, and it’s fixed. Even from far away.
Never accidentally changes blocks inside land claims.
No need to investigate who built it, who broke it, or when they did it.
Doesn’t matter if the griefer built with “natural” blocks, it will still be fixed.
No database.
No backups.
No chunk regeneration (it’s dangerous for technical reasons).
Fixes bad chunk generations, like floating islands. It will be better than new.
Fills holes, even next to water to correct big spills.
Smooths noisy terrain.
No griefer construction is safe. If it’s unnatural enough to be noticeable by players, it will be removed or filled-in.
Land claims can’t be used as a griefing tool.
It’s impossible to get a player “stuck” inside a land claim.
Land claims beyond the first require a golden shovel.
Minimum claim size prevents sprinkling small claims to annoy other players.
Max claim allowance grows with time played on the server, and can’t be cheated by idling.
A simple administrative slash command will instantly remove all of a griefer’s claims, no matter where they are.
Catches clever griefers.
Enhances the /ban command to ban ALL a griefer’s accounts (not just his IP address).
Logs sign placements.
/SoftMute command to shut down chat trolls without them knowing they’re beaten.
Abridged chat logs make reviewing what happened while you were away super-quick and easy.
Automatically mutes new-to-server players who use racial or homophobic slurs.
PvP Protections.
When PvP is off, no setting fire or dumping lava near other players.
Absolutely bullet-proof anti-spawn-camping protection including bed respawns, which requires no configuration.
No logging out, stashing items, or using plugin teleportation to escape combat.
Optional siege mode, to answer players who hide in their claimed houses to avoid combat.
Supports your server growth.
Permit players to exchange server currency for claim blocks (requires configuration and other plugins).
Grant claim blocks automatically for votes, donations, etc (console command provided, other plugins required).
Please Vote for Grief Prevention
I’ve also posted Grief Prevention on the Spigot site, where plugins are ranked based on reviews. If you love GP, please take a couple of minutes to give GP your rating and leave a short review. Better rating and positive reviews will help server owners who look for plugins on the Spigot site make the safe choice (GP) instead of downloading something sketchy or incomplete. Thanks so much for all your support!
http://www.spigotmc.org/resources/griefprevention.1884/
Screenshot
Changes
Latest Change
Support a hard-working dev! Please consider my other projects:
Phantom Admin –
GriefPrevention Flags – AutomaticInventory –
GraviTree –
DiamondGuarantee
14.0 Updates
Fixed /RestoreNature having no effect on 1.9 servers.
Fixed golden shovel tool (when configured as the claim modification tool) creating grass paths when you use it.
Fixed golden shovel annoyances new in 1.9, related to how Bukkit handles the new dual-wielding mechanic.
Added compatibility with MultiWorld, yet another world-loading plugin.
Sorry to keep you all waiting on this! :\ I was between houses when 1.9 came out and didn’t have access to my development PC for several weeks.
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DO NOT Update GriefPrevention to 11.3 or later until you’ve updated your server to the LATEST 1.8 (this will require re-running buildtools.jar to get an updated 1.8 server jar file). This is unavoidable, and due to a change made by the Spigot/CraftBukkit team somewhere along the way in 1.8 development. Symptoms of an outdated 1.8 server include errors logged during boot, explosions destroying blocks where they shouldn’t, and entities like armor stands, item frames, and animals NOT being protected.
Recent Major Changes
Claim Expiration – Version 13.6 and higher. Enabled claim expiration on all servers at 60 days of player inactivity (since last login), with the exception of claim owners who have a claim block total of at least 10,000, or a bonus claim block total of at least 5,000. All of this is configurable in config.yml.
Narrow land claims – Version 12.1 and higher. The config setting for minimum claim size (height and width) has been replaced with TWO settings – width and total area. These new settings default to 5 and 100 respectively, to allow for more narrow land claims, empowering players to more efficiently protect railways and roads, so they might actually do that now rather than rolling the dice and then complaining to admins when someone damages their roads.
Selling accrued claim blocks – Version 11.0.2 and higher. If players sell accrued blocks, those blocks will NOT re-accrue over time.
Nether portal protections disabled by default – Version 10.6 and higher. For sake of performance, the feature which prevents nether portals from being created in land claims without permission (by creating a nether portal at the corresponding coordinates in another dimension) is turned off by default. You can enable it in your config file. This “grief” is very difficult to execute, opportunities to attempt it are rare, and it’s surprisingly expensive to prevent. Even when it works, the “victim” might actually be appreciative, since he didn’t have a nether portal nearby already.
PvP worlds reset – Version 10.4 and higher. This area of the config file has been frustrating for many for a long time. I’ve rewritten it to be more readable, much easier to edit, and now you can have an empty PvP worlds list on a PvP server, if that’s what you want. When you update to this version, you will have to customize this part of the config file again (if you ever customized it at all).
Finding offline players by name – Version 9.0 and higher. For sake of performance (not producing lag), players and admins can only target offline players who’ve recently logged in with Grief Prevention slash commands like /trust, /transferclaim, /claimslist, and so on. I plan to keep working on this to make all players targettable without causing a lag problem. This limit on who can be targetted is a temporary solution to work around a problem introduced by the CraftBukkit team when they made the switch to support player UUIDs.
UUID Conversion – Version 8.1 and higher. During boot, an often very slow, one-time conversion process will replace player names in your data with player UUIDs. This process can take as long as one second for each player who has EVER played on your server. Make a backup before you upgrade, and please be patient. If this process is interrupted, you’ll have to restore from backup and start over. This change will ensure players who change their names will not lose claim blocks or access to their land claims. If there’s a problem, I need to know whether you’re online/offline/bungee, whether in database or flat file mode, I need your boot logs from the conversion attempt, and if possible, a snapshot of your data from before the update.
Disabled worlds in config – Version 8.5 and higher. If a world is “disabled” for land claims, then no land claims which already exist in that world (including administrative land claims) will be protected. For those upgrading from an earlier version ONLY, to ensure all existing land claims are protected, GP has defaulted worlds which were disabled to allow claims again, including player-made land claims. If this isn’t what you want, update your config.yml.
Piston limiting – Version 8.1.7 and higher. Pistons won’t move blocks outside of land claims. This is a huge performance win, but if you want the old rules back, there’s a new config option to disable this rule. Yes, players do get an explanation/warning when they place pistons outside of land claims, to avoid confusion for newly-placed pistons.
/DeathBlow Removed – Version 9.3 and higher. It’s no longer necessary, since the items players drop on death are now protected. This protection is on by default in non-PvP worlds, and off by default in PvP worlds. You may customize it in the config file. You can still use /kill to kill a player, although /kill will not send the player’s inventory to another player as /deathblow did.
All Recent Changes
13.9.1 Updates
Updated the API to support a new “NoExpiration” flag in GriefPreventionFlags.
13.9 Updates
When loot dropped by players on death is protected from theft, it’s now also invulnerable to damage (like dumping lava on it). Note that if an item is covered by lava even a little bit, the client will stop rendering it. But if you clean up the lava, you’ll find your items are still there. Items will still disappear if left for too long.
Fixed players placing hopper minecarts without permission.
API updates to support GriefPrevention Flags.
13.8 Updates
Performance boosts across the plugin.
In creative worlds, limited number of “active” (lag-generating, like hoppers and beacons) blocks per land claim based on total claim area. Players with griefprevention.adminclaims permission ignore this limit, and already-placed blocks will not be removed retroactively.
When admins use /softmute, that now also appears in the GP logs when “administrative activity” is enabled for those logs in your config file. Previously, this only appeared in your verbose server logs.
Stopped other plugins accidentally breaking GP’s anti-death-message-spam feature by setting the death message again after GP silenced it.
13.6 Updates
Enabled claim expiration on all servers at 60 days of player inactivity (since last login), with the exception of claim owners who have a claim block total of at least 10,000, or a bonus claim block total of at least 5,000. All of this is configurable in config.yml.
Performance tuned land claim expiration and then adjusted it to run checks more often, so expired land claims will be deleted closer to their expiration dates.
Fixed TNT minecarts being placeable without /containertrust.
Reduced the threshold for muting join/leave messages, to better combat bot spam which focuses on login/logout messages.
Banned word list now applies to chat and whisper slash commands as well as standard chat.
Fixed land claims to extending beyond the maximum claim depth (see your config file) in some situations.
Fixed the automatic chat help (auto-help delivered based on a player’s chat asking about land claiming).
13.5.2 Updates
Automatic soft mutes (due to banned words.txt hits from brand new players) are now optionally included in GP’s abridged logs under “admin activity”. Muted messages due to /softmute can also be added to GP’s abridged logs under new heading “muted messages”.
Fixed protected animals taking damage from explosive minecarts.
Fixed killer bunnies being protected in land claims as if they were passive farm animals.
Fixed errors in logs when using /claim in between the first and second right-clicks to create or resize a claim with the shovel.
13.5.1 Updates
Gave /Claim an optional radius parameter.
Fixed some minor issues with /Claim and chest-based land claim creation which were causing errors to appear in server logs.
Fixed an issue with backward compatibility (for flat file mode claims) which should improve error messaging when there’s a problem.
13.4 Updates
Added /Claim command to create a land claim centered at the player’s current location. If the player doesn’t have any claims yet, this land claim will have the same size as an automatic chest-based land claim (radius modifiable in your config file). Land claims after the first require survival players to be holding the land claim modification tool (default golden shovel), keeping that “you gotta earn additional and larger land claims” concept alive. Additional land claims will appear as the smallest square which satisfies the minimum area you’ve set in your config file. Creative mode players always have access to the tool, so they don’t have to hold one to prove it.
Added /ExtendClaim command to change the size of a land claim or subdivision, especially handy for scenarios like claiming a mountain or extending a land claim into a solid wall as in an underground build, where getting into position to right-click a claim corner block is inconvenient. To use the command, stand in the claim you want to change, face the direction you want to change, and then specify the amount like /ExtendClaim 5 or /ExtendClaim -2. It even works with diagonals. Like the /Claim command, survival mode players will have to hold a golden shovel in hand to prove they have one before they can use this command.
Added config options to ban players using a command line you specify, so GP can work better with any ban management plugin you have installed. By default, GP writes directly to the server ban list because that way it can record information about the ban like a reason (ex. spam) and a source (GriefPrevention) and show the banned player a message on the way out. The Vanilla /ban command only records a reason.
To reduce invincible pets scattered about, administratively-deleted land claims (expirations or /DeleteClaim) will automatically set free any pets belonging to the owner of the land claim, allowing other players to tame or otherwise remove them without getting an administrator’s help.
Added permission griefprevention.eavesdropimmune to prevent a player (presumably an admin) from being eavesdropped upon by other admins. Now you can give a player permission to eavesdrop and still eavesdrop on him, whereas before everyone who could eavesdrop was immune to eavesdrop.
Updated /RestoreNature with lots of new block types added in 1.8. Land restorations will leave less (hopefully zero) player construction behind.
Equipping a golden shovel while you’re standing inside a claim you own will automatically show you the boundaries of your claim, so you can skip the stick-right-click to find your corners.
13.3 Updates
Improved claim management where water is involved – now much easier to create claims on water and resize claims when the corner to be adjusted is on water.
Ensured players who place minecarts on another player’s track can get their carts back by only allowing cart placement when the placer has permission to remove minecarts in that same location.
Added a config option to tweak the delay between a new player joining and his receiving the land claiming manual.
Whispers from admins can’t be ignored.
Fixed shift-click with stick finding too many claims.
Improved logging for claim loading problems.
Fixed blank lines in bad words file causing too many mutes.
Now displaying player UUID in place of name when his name isn’t in your local server data (instead of “someone”).
13.2.1 Updates
Fixed some servers losing subdivisions during upgrade.
Disabled claim creation in worlds where claims will fail to load on next boot (worlds which are not yet loaded at the time GP booted).
Stopped deleting claims from worlds which do not exist at the time GP boots.
13.2 Updates
Messages.yml now supports formatting codes via the dollar sign ($). Find instructions at the top of your messages.yml.
Added a config option to protect pets outside of land claims even in PvP worlds. Note that pet wolves are NEVER protected in PvP worlds because they have the potential to attack players, who should be able to defend themselves.
Fixed ip re-use limiter being too aggressive.
Added permission nodes for /Siege, /UnlockDrops, and /Trapped. All players have the new nodes by default.
13.1 Updates
Soft-muted players can no longer send private messages to players who aren’t soft-muted (see list of whisper commands in your config file).
Soft-muted players can no longer use chat commands like /me to work around softmute (see list of chat commands in your config file).
13.0 Updates
Made slash command lists for chat and whisper commands smarter – all aliases are now auto-detected so you don’t have to tediously research and list every valid command variation. Or a translation – eliminated workarounds to get away with spam or dodge eavesdropping.
Added a handy comment to the top of the config file, which provides a URL for the setup/config page.
Added plenty of scary bugs to celebrate Halloween and GriefPrevention’s version 13.0. Yes, this is a joke. But seriously, did you know that since I started this project in 2011, GriefPrevention has released more than 200 versions, and has been downloaded about 350,000 times? O.o
12.9.1 Updates
Made monitoring soft-muted messages easier. They will now appear in your server logs, and if you configure your abridged GP logs to include admin activity, they’ll also appear there.
Added an option (default off) to prevent rabbits eating crops.
API: Added a public datastore method to get all the claims in a specified chunk.
API: Made the shovel mode enum public.
12.8 Updates
Added the griefprevention.seeinactivity permission node, which will show a claim owner’s offline time when you inspect his claim with a stick.
Allowed for adding a player to a personal ignore list while the ignored player is offline.
Added PvP world options to disable flint/steel and dumping lava buckets near other players. By default the rules are off, so allowing PvP by build.
Better new player detection for creative mode – this means players in creative mode severs with GP can use MineChat.
Cleaned up the help experience around some claims-related slash commands.
Fixed a free claim blocks exploit which was doable on servers where players can /sellclaimblocks.
12.7.2 Updates
Fixed rare “data too long for column…” errors in database mode.
Fixed hitting the concurrent database connections limit for servers who are online without a reboot for a very long time.
Added support for empty banned words list (bannedwords.txt).
12.7.1 Updates
Admins can’t be ignored anymore – they have a new permission node “griefprevention.notignorable”, which you can take away if you don’t want players using /ignore to determine who has administrative permissions.
12.7 Updates
Your basement and other underground structures will now be automatically protected by extending a new surface level land claim downward when you create a new claim, provided those structures are built with player block types and connected to other player-type blocks inside the initial land claim at surface level. In other words, fewer “I didn’t realize my land claim didn’t reach all the way to bedrock” complaints.
Fixed the boot issue with database mode which appeared in 12.6.1.
12.6.1 Update
Improved database mode reliability after a period of server inactivity.
12.6 BETA Update
Added auto-mute for chat trolls. Players who’ve very recently joined your server and spout profanity (see new bannedWords.txt file) will be automatically muted. They won’t know they’re muted, and an admin can undo the mute with /SoftMute.
Added a lite profanity filter. If a player who isn’t new to the server uses a word from bannedWords.txt, he’ll get a warning and his message will not go out. Later uses of banned words from that player will be muted. Note that this banned words list does not support regular expressions by design – see the setup/config page for an explanation.
12.5 BETA Update
In creative mode worlds, fluids won’t flow outside of land claims.
In creative mode worlds, several block types (cobble, obsidian, water source, lava source) won’t form outside of land claims.
12.4.1 BETA Update
No more attackers placing TNT in besieged land claims.
Now cleaning-up any water above sea level in creative mode worlds when a land claim is removed.
Fixed siege attackers having permission to toggle /ClaimExplosions.
Fixed invincible attack dogs in pvp worlds labelled as non-pvp worlds in the GP config file.
12.4 BETA Update
Performance boosts for creating, resizing, deleting, and managing permissions in land claims.
Claim subdivisions (sub-claims) now have unique IDs.
12.3 Update
During a siege, attackers may now place TNT inside the defender’s land claim and ignite it.
During a siege, TNT will now destroy soft block types (see config).
After a siege ends, during the period where the defender’s doors are unlocked for looting purposes, attackers may now continue to break soft block types.
12.2 Update
Squids are now protected in land claims.
Added an administrative /ClaimBook command which gives a player a replacement claim information book.
Fixed an intermittent problem saving player data.
12.1 Update
Allowing narrow land claims (5 blocks wide). Introduced a minimum total area, default 100. If you previously customized the minimum claim size, you’ll want to reconsider and adjust again since you now have two different settings to play with.
Improved the repeat message anti-spam.
Reduced the delay between a new player join and delivering a claim book to 10 seconds (from 30).
API: Made GriefPrevention.lookupPlayerByName(string) public.
API: Made player ignore lists public (see PlayerData.ignoredPlayers).
12.0 Update
Added a cancellable event to GriefPrevention’s API so that other plugins may selectively disable the pvp protections.
11.9 Updates
Now giving new players GP reference books. This solves a few persistent problems. 1) players somtimes miss the in-context help messages, 2) players who watch the instructional video and play on non-default config servers get confused because the tools are not golden shovel and stick on their server, and 3) built-in command help is clunky. Yes, you can turn this off in your config BUT before you do, know that 1) only new players will get the books, 2) no player will ever receive more than one from the plugin, and 3) the books arrive about 30 seconds after joining, so they won’t interfere with any on-join kits.
Tweaked the portal trap fix’s timing (10 seconds standing in a portal instead of 5).
11.8.1 Update
In non-PvP worlds, players were successfully mounting tamed horses outside of land claims without permission, and placing fire and lava near other players. This is now fixed.
11.8 Updates
Claim managers (/PermissionTrust) may now use /UnTrust again, but can’t target other managers.
In creative and survival-requiring-claims worlds, players may now create their first land claim using a chest like they would in Survival mode worlds.
Reduced punishment for trying to chat an IP address that’s not on the allow list (see config file for allow list) to message mute for first offenses.
Now supporting an empty list of commands requiring access trust when used in land claims.
In worlds where land claims are disabled, right-clicking with a stick doesn’t prompt any messages now.
Stopped eavesdropping private messages directed at players who have the eavesdrop permission.
Added an API to determine whether or not a player is on the /softmute list.
11.7.5 Update
When GP bans a player, there will now be notes in your ban file identifying GP as the source and listing a reason.
11.7.4 Update
Configuring a redstone comparator (default: right click) now require build permission inside land claims.
11.7.3 Update
Fixed log spam when claim block accrual rate is set to zero.
11.7.2 Update
Fixed /ContainerTrust not allowing farming in claim subdivisions.
Download Links
For 1.9
http://download.minecraftdata.com/index.php?act=dl&id=353443
For 1.8.3
http://download.minecraftdata.com/index.php?act=dl&id=353444
For 1.8.1
http://download.minecraftdata.com/index.php?act=dl&id=353445
Credits: bigscary
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