OP may come across a little alarmist, but it's really easy for online communities to become Nazi bars if the admins aren't carefully weeding out the ne'er-do-wells. Especially in places with open signups. Taking a hands-off approach and simply hoping that everyone is going to be a mature adult and behave themselves is effectively voting to surrender the site to assholes.
And yeah, they follow "the rules", and free speech and all that, until they don't. The thing to keep in mind is that these are not folks who, as a community, are interested in engaging in good-faith discussion. They are looking for a platform to spread disinformation and troll the libz, and any platform that facilitates it is also complicit.
Detry