Should you report a hit and run to your insurer if you have no collision coverage?

Well, they will just formally deny the claim because there is no collision coverage on the policy, but I would anyway, just in case, (believe me I've seen these), two months down the road, the hit and runner, files a claim that you hit their parked car and left, and the damages could match up. Just to protect yourself I'd file it, and with the police as well.