I got tired of reading all of the derails. I took the OP as an opportunity to try and figure out how to get the kids off the car without violence. Calling the cop worked. The best I could come up with is to turn it into a photo/video shoot. Get out your cel phone, or camera if you've got it, and start talking to them like they're models. "Yeah. That's nice. Turn your head. Give me a little more snarl. Now pout. The light is on your right, turn to your right. Can you arch your neck a little? No, not like that. Yeah that's it. Move closer together. Etc..." Eventually they'd get skeeved out and leave, and if they got violent you'd have video evidence for their trial.