@GuyDudeman I just reported a post on beige.party for racism. It's far from the worst example of racism I've seen but I'd say it was pretty blatant -- other people had already pointed it out but the person involved ignored it. Then again it's the kind of thing that many white people don't see as racist.
It sounds like you think that if mods don't act on it, the right next step is to call for a fediblock on beige.party. In practice, though, people on beige.party are likely to defend the person -- claiming that it wasn't intentional or whatever. Meanwhile others who have friends on beige.party who aren't saying racist things aren't going to know why their connections have been cut off, and if they find out why will generally think it's an overreaction. If mods haven't originally acted, the pressure on an issule like this is very unlikely to get them to change.
It would be great if that wasn't the case, but then again it would have been great if the person making the original problematic post had just listened to the original pushback and said "oh I get it", apologized, edited the post. But that didn't happen. Watch whiteness work.