Yesterday I rolled back this answer and, as it was my first rollback, got the "cleanup badge" and all was well in the world.
However, when I go to my "activity" tab I can't find any trace of the rollback, only the fact I got the badge. Is a rollback not an action that needs to be logged/easily findable? In my case this was rolling back some self-vandalism of a post and I wanted to keep an eye on it.
Maybe this could come under the "revisions" tab...or if it is already present and I just can't find it please say.