I can answer this very easily, you see I rarely hear anyone playing Country, Rock Jazz or anything as loud as possible and as a means to 'look cool'. If I did, they would get laughed at just the same.. I cannot discriminate here. An idiot is an idiot regardless of what music they listen to.
I assume every person bumping rap is a wanna be, because if they were a real G they would be confined to their territory, doing gansta stuff not driving around the mall with all of their paychecks on display via clothing or stereo equipment. Its just so hilariously juvenile and comical ... not a single person they drive past... not 1, not a girl, not a guy not a kid not an old person is remotely impressed by their bass, their amp levels or their swag.
Every single person just laughs at them. And its not rare for me to actually point directly at them in their car so they can see me and laugh while pointing, just to make them feel extra stupid. These are the least frightening people on the planet so I have no worries.
edit. I do on occasion run into some surfer kids at the beach blasting some rock.. they are just as stupid and just as much posers as the other guys. Its pure entertainment, so I enjoy running into any of these clowns.