Car Alarms... Whats the point?

During an adventure to the grocery store I heard someones car alarm going off, not a huge deal really; just ignore it. I did my shopping and came outside and waited for my ride. While outside the alarm kept going off, other people left as well and mentioned the same thing.

I started to think of when the car alarm first came out and how so many thought it was an amazing invention. We have all heard them and all wondered what the point is I am sure. The alarm sounds it doesn't contact the police and nobody cares about it. If you are a car thief you are really not going to be deterred by the alarm at all.

Home security makes sense for both protection of self, family and possessions but when they go off the police are alerted and sent to the scene. Car alarms do not have that little feature. If nothing else they are annoying and useless.

Like a presidential address, nobody is listening and nobody cares...

White Knight,