There’s not much one can really do about that. You can block their instance or join one that does it for you but that still doesn’t stop them from joining the fediverse or seeing the content here. Being an open platform means that it’s also open for the actors you don’t like.

With hate groups and extremists I was refering to the anti-right-wing, anti-capitalist, pro-socialism/communism, pro-anarchy, anti-AI, anti-facebook/twitter/google etc. sentiment that’s alive an well all over our frontpages here.