USENET, via email, via your own server, via a blog you host on your own server.
But those solutions (a) take effort and (b) implicitly decrease your potential audience because you aren't piggy-backing on some other organization's social networking. So it's understandable why people who get their jollies on upsetting other people would prefer an easier solution for them, like Reddit letting them say whatever they choose to unhindered because "Freedom of speech."
I'm 100% in favor of people who want to talk about topics Reddit has rejected setting up their own competitor. Maybe it will even become as big as Reddit. It's happened before.
