Seriously -- I think someone could make an anti-rap system and market it as such. Loud speakers, outwardly aimed smart-bomb type technology, honing in only on cars playing that other stuff, with the speakers blasting a choice of military marches, Beethoven's Fifth, or yodeling.
Hey, I can dream, can't I? LOL
Speaking of.....I'm going to call it a night. We're here on this thread tomorrow, too. Come again if you get a chance.