All forums see it happening now and again. A member gets pissed about something someone else has said and deletes all his posts in a moment of rage. Even if the board does not allow members to delete posts. The member will simply blank out his posts. If the member has a lot of posts this wrecks many threads. It generates a huge mess for moderators to clean up. To counter this I suggest the following: If a member edits more than X posts older than a week within Y minutes then block the user from editing posts and generate a report.