The crips have been known for operating these pcp networks for a while, the crip gang leader who was involved with tupacs murder was also running a nationwide pcp ring too.
I think it sort of makes people feel invincible or something which is why i think gang members probably like it. I remember the death wish films where the bad guys seemed to always be smoking it, i think it was number 2.
What Crip that was involved in Tupacs death? Orlando Anderson?