I actually don't know why it is like this
it's always the suburbs, they want to be as cool as the gangstas in the videos.
the farther you go out of town, the more extreme people dress.
in most cases these people aren't clever. Especially as soon as they start to speak like gangstas. I mean intelligent persons may dress strange because they want to have some kind of an image. But you soon find out what's really behind it... as soon as they open their mouth. I'm not seeing intelligent people saying things like "eyh man! what are you looking at me?" and try to start a fight

Problem: You can be whatever you want... but what do you want to be actually?
Those who aren't clever simply follow someone. Choose a group you want to be part of, dress like them and act like them.
They enjoy the image of looking gangsta.