Annoying sounds from cars at stop light


What causes the stereo in the car next to you at the stop light so loud and annoying with over the top bass and how can the driver stand it?

128x128soundsrealaudio
I just bought a Metris and the sheet metal will vibrate with low frequencies.
Truly annoying.
But, it seems to have better bass than my TTS with a B&O system.
Now, that is sad.
B
I found an old car door in the junk yard that had a car speaker in it. Took it in my listening room and guess what???????????.  I couldn't get the door open, no, not that. The should was better then my Vandy's and my wilson audio's.  Just kidding.....
I agree with the person with the buzzing trunk lid. Anyone that would turn up the bass loud enough to buzz the back trunk lid like a passive radiator has a mental issue. (Compensating for something?)  These situations can be heard almost a block away. 
  Pretty soon they will have a hearing issue.  The SPL level is so high with some of these morons that I feel it in the floor boards of my car and my chest getting pounded and it is actually uncomfortable physically.  Soon the person will be bleeding from there ears not able to hear.
  I have some old re-coned 12"  Powered Boston Towers that put out thunderous lows while watching movies. (No sub needed) in the small town home. I built a pair of 8" Towers I use downstairs for the Stereo that have low resonating bass.  I am respectful about what time of day I turn these up to respect my neighbors. (Not too early and not after 9:30pm.)  I do not need to blast the music to enjoy it. 
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Usually the car next to me with deafning bass is playing 'crap' music for me.  However if the car next door was playing rock and the car was decent (Ford Mustang or some other V6 or V8 beast), good on you mate...!