How could anyone think this isn't done? That's just plain goofy.

My father got a ticket this way once. He showed up in court to defend himself instead of just paying it, and won on the grounds that the vehicle description that the "bear in the air" gave to the ground cops wasn't unique enough for the ground cop to be sure he'd gotten the same vehicle that the pilot had seen. (He also won another case that didn't involve any aircraft, just by showing up, because the cop didn't.)