Again, it's to emulate what they see on TV and be a wanna be gangsta. I don't think "real" gangs do this anymore but when they did which pant leg you had up determined which side you were on, kind of like red vs. blue bandanas. Every time I see this stuff on a kid who lives up in Summerlin (our rich part of town) I wish someone would pick the kid up in a van (say a white chevy express install van) and dump him off in the real hood. See how long it takes for him to dial up mommy on his new iPhone.