In Before The Zot.
Many threads get pulled for being, well, pointlessly vain/vapid/stupid/inflammatory/etc.; when such a thread gets pulled, it’s a “Zot” (as in: lightning bolt from on high vaporizes it). When such a thread appears, lots of people like to get a post in before it gets “zotted”.
A short, vain, poorly worded, trolling, otherwise unpublished, thread blaming FReepers for not sufficiently supporting Mitt because they don’t think he’s a conservative is an ideal candidate for being deleted (zotted) outright.
ZOT is a little harsher than that. ZOT is when the poster or commenter has their account suspended and they are banned from posting under that screen name, yea verily, even unto eternity. Sometimes they resurrect under a new name (a retread troll) but get banned again.