mastodon.art has decided to suspend firefish.social from their instance due to issues with its administrator. The administrator of firefish.social was found to be boosting posts from a known harasser on another instance. mastodon.art takes a firm stance against racism and suspending full instances in these situations is part of their policy as a safe space. The known harasser has a history of using slurs, harassment, and editing screenshots to spread misinformation. However, the administrator of firefish.social has now forged a screenshot to paint mastodon.art in a negative light.
You know, it reminds me of that as well but I have an opposite take. The forums I was most active on in the early 2000s were generally ones that had split from larger ones and had became smaller but much stronger and more personal communities as a result. You had the luxury of breaking off precisely because there was no expectation that one community would ever have a monopoly for a topic. Maybe my experience is unique, I don’t know.
I can’t speak for the specific situation here because I don’t know anything about these instances. But the ability for people to split off after a terminal disagreement has generally struck me as a strong point to the voluntary federation we have.