my i suggest a rapid firing paintball gun to keep next to the front door? I would say the old 12 gage loaded with rocksalt and bacon rind, but there is always the issue of grabbing the wrong shells...(paint them bright orange to be sure). I say kick the living shit out of the sluts that did this and repeat if they come back. you may need a case of beer and a buddy to stay up all night with a bait car in the driveway, but chances are they are comin back!.....a company called GAMO makes very highpowered and nearly silent air-rifles...(many as powerful if not more so than a 22lr.) which can be used to take out tires of fleeing vehicles...and since they are silent....noone knows the better.