Been there, had that happen to a car of mine (in OH) a number of years ago - damage caused by who knows what. Repairs came to around $2k. Some people would leave a note - some wouldn't. I happened to get one of the latter.
I also witnessed a fellow back out of a parking space in a Lowe's parking lot (in OH), popping the car in the parking line behind him pretty good (empty car, customer in the store)......and then he started driving off! Me being not real bright, I walked in front of his car, essentially forcing him to stop (glad he did!). I walked up to his window (female also in the car with him) and asked him if he'd planned to leave them a note about the damage he caused. Then the brow-beating commenced......against ME!! He didn't hit the car.......I was seeing things......I needed to mind my own business - the guy was pretty cranked up, to say the least. I encouraged him to take some deep breaths, come out and look at the damage, and to do the right thing and leave them a note. He did - I even checked the note after he left. I make the rash assumption he didn't come back later to snag the note as I saw him drive out of the lot and down the road.
Bill