/bb rollback r:<radius-in-blocks>

BigBrother is a powerful plugin that enables you to investigate roll back griefing via a large and all-knowing MySQL or Postgres-based database. You have a choice between using immensely powerful commands to search an area for changes, or you can whack a block with a stick or place a log to see changes within a single block.

/bb log - Gives you the BigBrother Multipurpose Tool, or a simple log. Hit something with it to see changes in that spot, and place it if the block you're checking is non-solid, like water, lava or air.
/bb done - Removes the log from your inventory, and gives you back any items it replaced.
Want to check an entire area? Use /bb here to list who changed what!
Need to roll back EvilGuy and DoucheBug's edits? Use /bb rollback EvilGuy DoucheBug!
Have to roll back edits up to 5 minutes ago? Simple! /bb rollback t:5m
Need to only roll back within a certain radius? /bb rollback r:<radius-in-blocks>
Roll back specific actions with /bb rollback a:10,BLOCK_PLACE
If you screw up, /bb undo
(NEW) /bb history "Suspicious Guy" to see that player's recent history! (add pg:# to go to page #)
Mow your lawn with /bb mowlawn!