The problem is, the monkeys don't discriminate re: which threads are best to throw turds in. They throw them everywhere. When you get above a certain percentage of monkeys, almost every thread in the board becomes unreadable. And it's not like you can just ignore them, because invariably they throw poo at some good poster you want to read, and then you can't avoid the back-and-forth. And because those back-and-forths get emotional, otherwise great posters get sucked in and stop behaving rationally. It's just no fun. It's a pretty simple system. If you have good mods, you trust them to decide what's above and below the bar. Who contributes meaningful discussions and who does not. Who behaves with respect and who doesn't. Who's a legitimate 'source' and who's posing. If you don't trust the moderators, the board's going to suck anyway, so you're better off just supporting them since this site's so big it's now got critical mass. Under-moderated forums are a lot of fun. But the sort of relative anarchy they invite makes it impossible for them to grow big enough to attract an interesting range of opinions. What you end up with is hilarious, and interesting, but not productive or large in scale because the urge to goof around distracts from, you know, actual discussion.