in primal settings you can add other users' mute lists
in general i think nostr apps should take advantage of the fact that mute lists are public, more
some interesting tooling you could build around them
Discussion
Mute lists are not public per se. The nip allows both public and private entries. It's just very differently implemented by clients.
Ban lists need to be implemented at the relay level, and they should exchange them, constantly updating. There should be a group of "white hat" curators to guide the system. Let's make Nostr safe!