After living next to a shopping plaza for six years, my hatred for car alarms is extreme. It quickly became very clear to me that no one gives a single solitary shit whatsoever when a car alarm goes off. Further, I learned that car alarms sometimes just go off, for no reason whatsoever. If your car has an alarm, it’s probably gone off and annoyed some poor bastard or bastards, and you never even knew it. Ultimately, when an alarm would go off, I came to hope the car was being stolen. At least that would mean the source of the noise was leaving the area, rather than staying and just continuing to go off.
But when it comes to the uselessness of car alarms, don’t just take my rant for it. Read this great exploration of car alarms over on Priceonomics.