My son has had the same problem with his black tran am !!! Lots of crazies out there !! We had to put up a 2nd 2 stall garage just to keep everyones car safe at night !!! We live in the country about 125 feet off the road & still not safe !!!! Even in broad day light they mess with cars in parking lots any more !!! Dont know the answer hard to keep them safe !!!!