I've never understood the huge thumping stereo systems in cars. I've been in a car with a relatively crappy, but still loud system and it just hurts your ears and your chest. It's stupidity. My sister dated a guy who had one in his car and after 6 months he was completely deaf in his right ear.
Related story: There is a house next door to us for rent. Lots of people have stopped by to check it out including this family who's stereo system was shaking my entire house. The father is driving the car, the mother is in the passenger seat, and there are three little children in the back seat, none of which looked over 4 years old and the stereo is absolutely blasting the bass. I thought to myself, "Way to get your children started in this world... make them deaf!!!"
Asshole.