Since this has happened before...what about spending some "theft prevention" dollars on something has simple as "The Club" or "wheel locks" or GPS vehicle tracking devices? Nothing is 100% guaranteed of course but if you have vehicles sitting out in the open on an unsecured parking lot, common sense would suggest after one theft to take some preventive measures to help minimize it happening again. Who knows, maybe a couple of hundred dollars spent towards theft prevention would eliminate having to possibly spend thousands of dollars to replace a vehicle.