My old car had an alarm. When I would get to the car I used the little thing on the key chain that turns off the alarm and unlocks the doors. Sometimes, I would here an extra chirp, it meant that my alarm had gone off since the last time I set it. I did not give it much thought.
One day there was a nasty note on the car, "Your alarm woke me up, I will bash your car if it happens again." I realized that I did not hear it... I could not hear it.. I could not hear my alarm from my apartment now matter where I parked.
I disabled the alarm. It's only purpose was to give me a discount on my insurance.
It is only a car.