If you acccidentally delete a user but not their posts, you can register a new account for that user, then run this query to associate the old posts with the new account:
UPDATE post SET userid=‘xxx’ WHERE username=‘Old Name’;
…with ‘xxx’ being the userid of the new account.
Then update the thread and forum counters in that order:
http://www.bullshido.net/forums/showthread.php?t=21111
Last page of that thread I see KhorneliusPraxx’s username dead. You know, the guy that alternated between posting pictures of hawt womenz in bikinis and his family as avatars?
Amusingly, I was just in his supposed town of Orlando, FL. I sent him a message on Facebook but I know he rarely uses it. Can anyone else that knows him better check?