Yep. I understand that. I look at it as stupid. But consider that the parents set the example, out cruising on their Harleys wearing all the leather and imitation Nazi helmets trying to look like bike gang members. (Nothing against motorcycles, though harleys seems exempt from any noise ordinance)
I do not think most folks really know what gangs of any sort are into. Motorcycle gangs do some pretty nasty things; why would anyone want to even remotely resemble them?
'Cause they get loose and easy chicks?
That'd be my guess...