Give it time, sooner or later one of the crazies will commit a terrorist attack and kill some one.
Canada has much more stringent and scarier rules on the books then America does, and space battles is on a candean host. When that attack happens and it will the owner of the site will get a knock on the door, and then you will see a mass purge of the nut cases.
As for Sufficient velocity, its bizarre set up will see it reform itself slowly, because the people we bitch about cant get along with any one and alinate every one around them. SV will remain left wing but reform itself after things stop being crazy, and SB will reform itself all at once after some body fucks up big time.
Until then this is a pretty good place to hide out and try to wait out 2020 which is going to suck royally.