As far as I can tell it's about 6 to 8 people, some of whom pretending to be more than one person, most teenaged, posting inane juvenile crap, most of which is trolling. There're also a few anomalous posters, intelligent, thoughtful, and pleasant. It's easy to tell the difference. Though they may start out well, the children resort to name calling and internet machismo quickly when trounced with reason. I saw a map that represented the 4chan text boards as a tiny archipelago.