It is very much needed.
I will pick on a few brands popular with Utah gangs Dickies,Southpole,DC,and Insane Clown Posse music group emblems. I will pick on a few sports teams: SF49rs,St Louis Cardinals,North Carolina,Oak Land Raiders,NY,etc. These have both non criminal gang symbolism and criminal gang symbolism.
http://www.ksl.com/index.php?nid=148&sid=9966088