You can block instances yourself. Check your Settings then click the Block tab, then enter in the domain under Block Instance.
Defederating has wider ramifications and just because there are a few bad users or opinions people don't like doesn't mean that everyone should be blocking them.
We have a few of those users too who regularly get into fights or who might be classed as mean, so if that's the case then we would be blocked too.
Standards that one server has cannot be enforced by another server.
Also no dog-piling onto this thread which I'll be locking if it happens.
Blocking an instance only hides posts, not comments
If it's any consolation, my blocklist is about 50% Hexbear users, ones who just go around brigading and trolling anyone who's not a militant socialist or communist.
Blocking those people that find enjoyment in tormenting people seems to work well enough, and the remaining few you might run across tend to be more thoughtful in general. And if they're not, just throw them in with the others. It's good for your mental health and theirs, because you never see each other.
I'm good with that. I have the instance blocked and don't miss them
