I proposed a way of doing this called Relationship Status, which not only allows you privately petname pubkeys also categorize your friends and assign scores to them in a true Web of Trust fashion. Clients can do all that in a public or private way with the same event format.

GitHub

nips/81.md at relationship-status · vitorpamplona/nips

Nostr Implementation Possibilities. Contribute to vitorpamplona/nips development by creating an account on GitHub.