I think I read something about how when you block a domain, it only blocks content hosted on that domain. But a text post, for instance, gets copied over to your instance and served from there, so it’s still visible. That’s why there’s so many posts from “kbin.social” that are actually from Lemmy.
If that’s the case here, then better blocking is needed.
What frustrates me is that it makes total sense for people who want their own corner of the fediverse to defederate liberally and keep their community small. Not every instance is trying to be Reddit; some are basically a special-interests messageboard.
But the fedipact is not a group of people building their own more private network, it’s just culture war and bullying. Instead of being a positive, it’s all negative.