User blog comment:TheEpicmanLives12/BURACRAT!/@comment-3447485-20110318215715/@comment-2194058-20110318223208

A Rollbacker is an easier way to undo edits. If you rollback on a user who edited before it, lets say: I have 4 edits in a row. If you rollback it, all of my edits will be gone and will revert to the last user who edited before me.