Rockin' out (I guess)........how much is too much?

Its a little pompous of you to think that your taste in music is the only acceptable taste. If you park next to me, I will retaliate. And that means an endless loop of Tiny Tim singing "Tiptoe through the Tulips" through 6 foot tall tower speakers. The frequency of his voice has been known to shatter glass. I have a pair of noise cancelling ear protectors used on the flight deck of an aircraft carrier.
Wear headphones.