Well, here in the redneck side of Cali, it's a trend that's been going on for a while, but as for the ethnic diversity...well, we don't have any. When I graduated, there was one (and I'm going to offend someone no matter how I phrase it) person of African decent in my entire high school.
It's a look that's better on girls than guys, but a confident guy with a generic pattern can pull it off.