During some of the recent upgrades, one of the issues identified was that the banned user list was approaching 100,000 (mostly spammers on a "permaban"). The extensive list was causing some of the server "meltdowns" we experienced frequently. The admins went about purging the banned user list but accidentally nailed the "temp ban" user list as well. I asked about restoring the three temp banned users and was told that it wasn't possible.
SevenSins is welcome to reregister. I think we are approaching the expiration of his "sentence" anyway.
When things don't go your way, stop and think, "Problem, or inconvenience?" - with apologies to Robert Fulghum