unquiet on Nostr: An early idea, would it be useful for relays to decorate notes with tags/info and ...

An early idea, would it be useful for relays to decorate notes with tags/info and sign those with their own nsec key?

Clients could then read the tags and decide what to do with them. Like NSFW, X rated content, detected language, etc.

The note remains unchanged, but certain relays could become specialized at certain content detection and tagging.