I believe it is MY prerogative, and no one else’s, to decide what I am or am not allowed to see. I curate my own feed by blocking or subscribing to instances I don’t or do want to see, respectively.
What about abusive users that post in communities outside of their home instance? I think that’s what we’re talking about here. I can block instances, but there are communities in Lemmy.world that I enjoy and I appreciate the admins effort to keep abusive users out.