They also ban fascists, liberals, etc. Hexbear is pro-animal liberation, they don't want to see glorification of mass consumption of meat all the time. This is a silly point, you can't actually go your life without seeing meat being eaten, but that doesn't mean you have to see it everywhere you go. Same with porn, porn is censored, does that make it an echo chamber?

I think you ignored my points, why does Hexbear count as a "true echo chamber?" What does that even entail?