also, in an effort to describe my thought patterns here. nip42 auth, and a relay, .. can control read access to a relay. maintain a list of people that can do this, if they take and republish all the notes.. then what? is it a problem?

if so, then maybe people dont want to use their 'main key' in the group, for plausable deniability, right?

the thing about nostr that is different, is the signatures and the portability. so privacy in a sense, is more scary because.. you signed an artifact that is portable and have to trust your group not to leak it.

this is where atlas shrugs and im not sure what it all means.. do we just stop publishing signatures or some other tricks? maybe. but then trust inside the group falls to the relay or community admin.