Just a little notice. I think it has no sense to suggest some workarounds here. Remember Fencer doesnt need to use BrainKing interface to delete some posts. I believe they are all in database table so he can write one simple delete loop and execute it, all within one minute. Something like delete post where user_id=3629 (E.T.) and board_id=179 (this board).
In my opinion perhaps editing and deleting posts should be done in a way allowing to track the real contents (may be it is even done that way I dont see into Fencers code :P). I mean the history of changes should be stored and instead of real deletion only some flag should be set. If such text messages history would consume after some period of time more disk space than necessary, it could be deleted after doing backups and left only in those backup databases to save space. May be the history of changes could be accessible for everyone or moderators to view by clicking at some little link near to the post to prevent situations where someone writes something rude and later edits it letting the reactions look unappropriate.