When I was a kid my dad instaled an after market alarm with a hidden switch, you had 30 seconds to turn it off after opening the door, this old fashond method worked well untill they put a sock in the noise making part. Maybe this old technology is better than the new radiio alarms. My neigbor is able to listen in on peoples cordless phone conversations so it may be possible to turn off the alarm with a home made transmitter. NO OUTDOOR STICKERS. DRIVE AN OLD CAR, THE MORE DENTS THE BETTER.