Back in October, a spammer created a thread in Cafe Society which was reported by hajario. A moderator removed the original spam post, but due to what I understand was a software glitch, hajario’s post was left behind and gathered more replies.
http://boards.straightdope.com/sdmb/showthread.php?t=808975
The thread remains, like a leftover Halloween zombie. Since the board glitch has been fixed, and mods can once again banish threads to the cornfield, there seems to be no reason for this thread to still be at large.