I'm so sick of hearing car alarms. Why do people still buy them? And why do manufacturers still make them? I doubt they deter robbers at all, and they certainly no longer cause any sort of reaction from people on the street.
At this point, don't you think a better idea would be to make car alarms more like ringtones? Car owners can personalize them with a song that most people don't like, such as Hilary Duff's "Wake Up" or Clay Aiken's "Invisible." That way, if a thief is actually trying to break into a car, he'll probably be embarrassed to be associated with that song and run away. And if it goes off accidentally, at least hearing a bad song is better than that annoying alarm.