How do you know they're acting like black dudes? Maybe this whole fashion statement was coopted from the white community by blacks? Maybe they all shop at the same gap store and are simply victims of madison avenue and 12 nippled, lamp shade wearing admen.
Ever consider the remote, yet quite probably likelyhood (??) that this is a subversive alien plot sucking the brains out of the youth of America to power their evil alien ships around the planet stroogus 23 where basselopes bound through the purple sky and take showers in zarilian ale.
In summary...
Jelly doesn't have seeds, jam does.