Honestly that's what I love about the #fediverse. A group cannot be banned from the entire platform and if your in a decently moderated instance or self-host and use #fediblock (I think this might've changed to something else) you're free of those people.
Personally however, unlike Elon I actually am a free speech absolutist, and as such I don't use any curated Blocklist (I am the sole user of my server. If I had other people on the server it might be a different story). I just block people who I deem as spam, such as that user rapebot (I think the server was Detroit something). Most people haven't seen it because instance admins really are the unsung heros of the fediverse.
That being said, I don't see many crazy people like that unless they throw in #mastodon or #fediverse as most of my followed hashtags are tech related.