I think technically this is the idea that GPG's web of trust was circling without quite staring at, which is the oddest thing about the protocol: it's used mostly today for machine authentication, which it's quite good at (i.e. deb repos)...but the tooling actually generally is oriented around verifying and trusting people.
Yeah exactly, this was exactly the idea behind that. Unfortunately, while on paper it just sounds like a sound idea, at least IMO, though ineffective, it has proven time and time again that the WOT idea in PGP has no chance against the laziness of humans.
