The big 3 - lemmgrad.ml, hexbear.net, and lemmy.ml, and now reportedly add midwest.social as far as this matter is concerned (though that one still differs in other matters, as regardless of the behavior of its admins, most users seem to just see the word "midwest" and think "I'm kind-of left-leaning myself so...") - are extremely well-known for banning people at the drop of a hat. Much (exactly) like conservatives, authoritarianism is totally okay, so long as it occurs by their preferred, blessed places/people - it is only those "other" people, especially those who don't agree hard enough, that derive the most ire from them.