Blocking trolls, yeah, or instances that are more trolls than good faith participants. Maybe you don’t see a difference between that and just different opinions because you don’t know how to disagree in good faith.
I approve when a server defederates from instances that have a large number of bad faith actors. Like strawman arguments, “examples of clueless tankies,” attempting to disguise the fact that they are as numerous as they are toxic. Like, “treated like an adult,” as an adult I’d like to not read rude and childish nonsense coming out of Hexbear.
If someone would suggest an instance that excludes hexbear, lemmygrad, and .ml I would like that. Lemmy.world is 2/3, that’s nice. I assume the instance is only federated with .ml because .ml has some of the bigger communities. Unfortunately the .ml admins are actively participating in delusional thinking and silencing anyone who disagrees. Sounds like deciding for you whom you can and can’t talk to, but that must be totally different for some reason.