Digital ID seems needed, but it needs to be p2p.

I meet you in person, I put a tag on your npub saying whether you match the face in your pics.

If people have tagged me as an npub to get those tags from, it shows up for them.

Maybe if those people are tagged by others as people to see those tags from, it shows up for them too?

I've talked about this before. It's essential for dealing with spammers like nostr:npub1mzyp990kgskujdyplzydmd08ft42mkkfg4lzldaap8ng7n2u3kmspryvaw who constantly cycle through different npubs to harass you endlessly