>In fact, there were always Nazis around, and communists, and all the other toxic trolls and crazies. But they were only ever an annoyance, because if a community didn’t like those people, the moderators would just ban them. Even normal people got banned from forums where their personalities didn’t fit; even I got banned once or twice. It happened. You moved on and you found someone else to talk to.
Doesn't this create an opposite problem: echo chambers?