I don't know the answer, generally speaking, but we've got a pair that pop onto the back fence every morning waiting for their peanuts. I think they're multigenerational, as I have reasons to suspect that the "original" Mr. Peanut has passed on. Anyway, the bold one will come sit with me in the front yard. When I walk the dog, they'll follow me for a bit, flying a few feet off the ground right in front of me, I assume to make their presence known and get a piece of dog biscuit (which I oblige). They have never gotten obnoxious about it by crowing at me, just silently hanging around: "if you could spare a bit of dog food, kind sir..."

Friends? It's probably transactional from the crow's POV, but OTOH they hang out on the fence and just sit sometimes even if there are peanuts on the ground. I enjoy seeing them, though. I will say, though, that after many pounds of peanuts not a single one of the little bastards has ever brought me a present, as is advertised. :-)