well "what my pet AI thinks of this" automatic classification (there's indeed already an event kind for that) isn't quite the same as community notes

community notes tend to involve actual, more thorough research by humans and links to sources

but to be honest i don't see a way of doing that here either
twitter's community notes (https://en.wikipedia.org/wiki/Community_Notes) has an elaborate crowdsourcing process but is eventually managed by one org
in a decentralized setting it'd be trivial to spam it
at the least the client would have to give a choice what community notes provider to use and which to ignore