Relay operators can ban/censor npubs. Clients (I think) can ban/censor npubs.

Intuition leads me to believe if 1 of your 8 connected relays bans an npub, and you share at least 1 of your 7 other relays with that npub, you’ll still see their notes.

Which means client banning is probably more comprehensive (than relay banning) IF many people use that client.

Regarding earlier in this thread, I don’t believe you have a right to your subjective definition of peace at all times. I believe you should be given the tools to mute and/ curate your own algorithm to work towards your definition of peace. Which will realistically require continuous light maintenance. I doubt (and hope) you’re not asking for a utopia here. These are good conversations and your desires are valid.