"Easily" lol - I mean conceptually. The infrastructure could probably handle the core functionality already.

Building trust is hard. Nostr doesn’t fix this.. (imho)

I'm sure I saw someone working on something like that already - can't remember who though

There is a legal and recourse issue that is difficult to solve in a decntralized fashion.

Check out Ridestr and Drivestr on Zapstore.

not really, that is going to be very hard but eventually we should