Some thoughts on Mastodon culture, server rules, diversity and inclusiveness
Compuserve was a social network before the term existed. It was organized by forums by topic. A forum had several rooms for more specific areas in the topic. It worked well until bought by AOL where it withered and died. It was easy to check out other public forums. (Some were private.) This was before diversity became a factor, so I don't know how diverse the system was. I suspect not very diverse.
The forum I visited most would have welcomed anyone, I believe. Our moderator prided himself on never banning anyone except for a few guys who were known to disrupt discussions and one woman who would post absolute gibberish when off her meds.
My guess is for Mastodon, it would depend on the administrators of the servers and those in the community. The larger issue would be the responses from the federated feed.