You answered your own question.
Blasting music out of a vehicle is probably one of the most annoying things you can do. It's really a trashy inconsiderate act. It's up there with phaggots on motorcycles revving their engines at the stop light, guys on cruisers music turned way the fukk up to drown out the engine when to everyone else it's just a one garbled noise.
What else?
Peeling out?
Cell phone ringers?
Not turning the fukking tones off a cell phone when you are texting?
So If I hear your music while I'm watering my lawn especially loud explicit lyrics, I'm probably going to think you're a weed smoking, degenerate who has no business in my neighborhood.