has anyone had a problem w/ them like if they are parked and someone that has their stereo all the way up (w/ subs or something) vibrating the car and setting the alarm off? Cause i want to install the alarm but i'm afraid that it's going to go off like if i'm parked at the mall or something where a lot of people bump their stereos.

 

Don't forget about those fart can racer cars too..



Just set the sensitivity on the sensor...
My old car had a shock sensor in it and I worked next to an airport.. I had to adjust it so that the planes going by didn't set it off, but still have it sensitive enough to detect break ins..