Bcsizemo is talking about 4chan, though.
Reddit is hard to pin down because it’s not really a forum, it’s a huge collection of unrelated forums. Anyone can make a subreddit for anything, and moderate it as they see fit. There’s subs that are festering shitholes and subs that are well-run and pleasant.
The default subs (the several dozen subs that new users are subscribed to) are somewhat more homogeneous culture-wise just because most people see them, but quite of few of them (generally serious subjects, like /r/science) are sternly moderated to keep things on topic.
