Let's see...
Reguilith left after a huge spat with Atlas (formerly Aeris)
Atlas was later banned himself...
Aripany showed up claiming to be Atlas's roommate and got banned for saying "about time" quoting the OP of the drama Acerblock made about him/her...
Aphtonites posted lots of fluffy ponies and Isaac Fox lost it and made a leaving post, committing forum Self Delete. Aphtonites was later banned for flaming the Furry Megathread (which was hilarious, because after posting in the pony thread with
abloo bloo stop posting what i don't like :( :( i'm serious!! please stop it's offensive and hard to ignore hoo hooo hoo! 
as a mockery of the people who didn't like fluffy ponies, he immediately turned and flamed the Furry megathread for posting about things he didn't like. Got banned and has since avoided this thread.
star9578 vanished for no apparent reason...
Dezcaban came back as RaR and posted an MS Paint blood image as a joke and it went right over my and Aripany's heads and we both reported him, and he got a week ban for that...
Isaac Fox returned as Sherwood McCloud, though he's stayed out of the pony thread for some reason...
Who else has vanished for no apparent reason anyhow? I took a two month hiatus during March-April-May area and missed a lot of stuff in there.
Also Crispy_ (alt of Christopher P. who was banned during his brony drama topic for saying "i dont even care anymore youll just find some way to get me banned anyway" (how ironic)) drama'd me for being confused by his comment which dragged pony hate into a completely unrelated thread. I PMed him about it. He dramad me over it ten days later, during which there was no correspondence. We proceeded to argue like handicaps in the thread (although his comment about "brony dictatorship" and "getting insulted online is like the death penalty for insulting a dictator" comments really take the cake) until masterockets talked me out of replying.
He also bitched over a single pony image in a search containing thousands of other images, many of which were unrelated to his search terms, and claimed that a 75x75 max avatar image is "shoving ponies down his throat".