I grew up in Southern California, a place no stranger to graffiti. I have personally seen the evolution of this art form. I remember as a kid, in the 80's, graffiti was not considered an art. This is due to the association of graffiti with gangs. In Southern California graffiti is still very heavily associated with gangs, and is still a very heavily punished crime, but in Medellin graffiti is art.