How can you trust that those who pretend to trust pubkey x are trustworthy, and not just a bunch of sybils?
Discussion
NIP-05. I control my domain.
This doesn't have to be bulletproof, I have a very specific use-case in mind.
Well you start with someone you know personally or through domain control (NIP-5) and then build from there.
It could be build as a identifier that shows that a pubkey is trusted by people you marked as “trusted”.