acb on Nostr: npub1r472r…swytr npub1uyxyr…mdmcm Which again is not very fine-grained, and ...

npub1r472r6l048muneexp0tx0rmhdz890lq6t7ds30unknl40tm9udhsqswytr (npub1r47…wytr) npub1uyxyr55xy9auvwxym75a38rgr5jsc29x08hwh65n6pl9l8wuzunskmdmcm (npub1uyx…dmcm) Which again is not very fine-grained, and assumes that everyone can convince all their friends to keep/check an account at their instance. Does the protocol rule out the possibility of having friends-only posts across different instances?