Back when I was active on Usenet it was considered pretty normal to have house rules for any newsgroup, you were also expected to refrain from posting long enough to notice and learn the unspoken customs (this was called "lurking").
Nowadays people see it as an orchestrated attack against free speech, shout references to 1984, and threaten to move elsewhere.
Yet the ones asking us all to behave politely are called "hypersensitive"?
@Jonesing Well if you are asked to not put your shoes on train seats, is that self-censorship?
The good thing here on Mastodon is that each instance can have its own level of permissiveness, so anybody can find a place they can call home.
Honestly so far I've had more civil and nuanced discussions in two days on Mastodon than in eight years on Twitter, I don't think conflicting opinions are impossible over here.