I guess I'd claim that it's noise pollution even if the car is indeed being stolen. Unless, of course, the owner is close enough to hear it, and interested enough to rouse his rump out of bed and come to the car. My experience is that most alarms are spurious, and the owner either lives too far from the car to hear it, or if he does hear it, decides to wait it out. So the entire neighborhood is disturbed by this guy's decision to buy an alarm.
Again, if he bought a silent alarm alarm, I'd certainly have no objection to it. He'd be awakened. He could react (or not) as he chose. IMHO an alarm that notifies "the public" is only justified if action by "the public" is expected. Question: If you park your car in front of my house and your alarm goes off, do you really expect me to react? Ya know, if I were a car thief, I think I'd just wear ear plugs and ignore the alarm, since everyone else does. I'd expect that I'd be just as "safe" stealing an alarmed car as a non-alarmed car. If no one's going to react, what's the point?
Solution to noisy vehicles 4817If I heard your daughter screaming "rape", would you really expect me to do nothing? Not true - if the car alarm sounds like mine (I only know what it sounds like...
Paul R