1) If we don't include the original One Piece, Naruto, and Bleach manga threads and we focus on regular activity between all the threads (not just popping into this thread once a month), I'd probably say Shouta.
2) Already answered.
3) I can only remember two instances. One poster who admitted in this thread or the last one that he had an alternate account, and then there was this clown who posted up sexual anime images in the thread and then acted confused when people got pissed off at him for the images not being work safe (I think they were child anime characters too).
Beelzebub 142:
Good riddance to memory loss Hilda. Other than the hilarious kissing jokes in this chapter, I'm glad to have regular Hilda back. Chapter was great regardless though and I'm hoping we can stay on a comical path a little while longer vs getting into another unwanted battle arc.