@rozenglass @alyx It's a thing I've been thinking about, lately.
I've been around on the net since before there was a www, and there have always been such havens for people who don't fit into the mainstream discourse for whatever reasons. If anything, perhaps less so today than back then, since any place that can be found and joined is more likely than ever to be quickly overrun with newcomers who don't share its soon-to-be-former values. The Fediverse is a lot easier to get into than the average hacker telnet bbs used to be. Also, it is of course now all monitored by the machines of those in power and everyone knows it. So perhaps the level of unorthodox weirdness is a bit lower really.
But as much as masses of people from whatever is left of "mainstream" culture infiltrate previously obscure corners of the network and transform them, they are themselves transformed. I think many of the problems in the world today are related to people having more access to information than they know what to do with. So, idiotic conspiracy theories and such end up with mainstream support to the point where even the president of the USA seems to be into some of them.
To me the answer is not to try and go back to a world where someone like Walter Cronkite told everyone what to think (as I've seen seriously proposed, recently). But the answers I would have in mind, like getting people accustomed to thinking for themselves, seem impossible; so what do I know.