From having written one too many police reports relating to kids with nothing better to do with their time than to destroy other people's property, it honestly wouldn't shock me if it was a completely random act. 16-22 year olds have no respect for property. Perhaps because they are too young to understand just how expensive things are. Mommmy and Daddy have always bought them everything they wanted. I surely hope they are caught, but if the court system in CA is anything like it is where I work, don't expect them to received much punishment...