I'd like to see the statistics that lead you to believe that very few of the people that "do graffiti" have anything to do with gang activity. Perhaps you mean

I'd like to see the statistics that lead you to believe that very few of the people that "do graffiti" have anything to do with gang activity. Perhaps you mean the fully commodified art form which is practiced on building walls with the owner's full permission but with a certain kind of serif and flare? Or maybe you mean the occasional lewd remark on a bathroom wall? Certainly, you are not referring to the vast majority of graffiti you might see in public places in New York, LA, Chicago, Oakland, Detroit, Baltimore, or any other giant city which is in fact a log of blood, death, and hatred committed in service to gangs.