Give crows a reward, and they'll remember your face/clothing
Scare them away, and they'll also remember your face/clothing
If anyone hypothetically wanted to, they could buy lots of dry cat food (which crows love), and teach them to like you
And you could also try to trample them/shoo them off, wearing CERTAIN UNIFORMS, teaching them to hate people who wear said uniforms
I've got a nice crow that eats shit (not actual shit) out of a compost bin sometimes.
I swear crows have gotten bigger over the years though, anyone else noticing this?