Moderation should be performed at the user level. Relays should be simply that, relays. As dumb as possible. Give users the tools to set as many filters as they can possibly want, so they are the ones responsible for what they see.
If we start to have relay owners making decisions like blocking whole other relays instead of users, we can't speak of a network and we're back in the silo citadel model ruled by petty tyrants. nostr:note1rw7rzq6c7f6x9r59677xp9c5p8ueu22vrcavfnsqkyrzjf8e04jq8vgmx0