Does anyone have suggestions with making their "E" as burglar proof as possible? I've had my "E" for three months and last night while parked at a local Barnes and Noble, I noticed my key wouldn't go into the driver's side door. Someone had attempted to pry open my "E" with what appears to be a file of some kind and damaged the key hole to the extent that my key will not go in. I can still open the door with the remote, though. They also attempted to remove the door handle panel. They had no luck. They didn't get into my "E". They just damaged the key hole and the door handle panel. Does anyone think that a separate alarm system will be of any value? Or will it interfere with the alarm that already comes with the "E"?