What's so fun about smashing and destroying other people's property? The better question is: would they have done it to their cars or their family's car?
Obviously, those kids had no respect for other people's property. I also contribute their stupid and destructive behavior to peer pressure due to lack of values.
The punishment for those kids will have having them work and pay off their damages to the car owners and go to counseling. They'll learn the hard way then.