VanilLog

VanilLog is a 100% vanilla Minecraft datapack targeted at catching griefing/raiding/etc on Minecraft servers, without affecting gameplay in any way. All you have to do is place the datapack in your world/datapacks folder. Then you'll be able to see in your server log every time a player does one of the tracked actions.

VanilLog isn't intended to stop or prevent griefing, but give admins the information to determine who may have done the griefing. I made it specifically to have as little impact on gameplay as possible, you're free to modify it to log whatever else you might want to log and if you have any suggestions please let me know, this is the first datapack I've ever made so I'm open to constructive criticism. It is also not perfect, there are probably plenty of ways to get around detection due to limitations in minecraft, such as detecting killing non mob entities not working and no stats for opening chest boats, chest minecarts, etc.

Currrently it logs:

Opening Chests

Breaking Chests

Opening Barrels

Breaking Barrels

Opening Shulker Boxes

Breaking Shulker Boxes

Opening Hoppers

Breaking Hoppers

Placing TNT and TNT Minecarts

Placing Dispensers

Picking up item frames. Unfortunately due to bugs.mojang.com/browse/MC-128473 minecraft.killed:minecraft.item_frame and much more doesn't work, so this is the best I can do to track people breaking item frames.

Picking up filled maps. This is a problem for me cuz people keep breaking map art and stuff.

Using Lava and Water Buckets

Using Flint and Steel and Fire Charges

Breaking Coal, Iron, Gold, Emerald, Diamond, and Netherite Blocks

Breaking Beacons

Breaking Farmland

Placing Hoppers

Placing Hopper Minecarts

Picking up glow item frames

Picking up Hopper Minecarts

Picking up Chest Minecarts

Breaking any Sign or Hanging Sign variant

Breaking and Opening Furnaces, Smokers, and Blast Furnaces

Breaking Spawners

Breaking Lodestones

Using End Crystals

Breaking Crafters

Breaking Vaults

Breaking Trial Spawners

Breaking any Copper Chests

Killing Copper Golems

To briefly explain how it works, it monitors scoreboard objectives for all the actions you want to log. When a player does something you want to log, the datapack summons a baby pig with a name describing the action exactly 1000 blocks above the player. It then spawns a splash potion of harming above the villager and sets the "owner" of the splash potion to the player. The potion kills the pig, and the pigs death message serves as the log entry.

If you'd like to contribute, visit https://github.com/TheAdorableCat/VanilLog