People do not make the sense.

So I am in the car with Benji at a stop light on a four-lane road. (In case you are curious, I am driving, not Benji.) A car pulls up next to me at the red light, and its radio -- playing hip-hop beats, of course -- is far, far louder in my own car than is my XM. Out of curiousity, I turn to look at the car, and...THE DRIVER IS ON HIS CELLPHONE! Someone, please explain.