Appreciation and economic opportunity to develop their artistic value (e.g. workshops, commissions, grants, purchases)

Graffiti is part of urban fabric - can be artistic and cool - coverup problem graffiti and focus on gang tags and related crime

Art, shmart - they are thugs and should be punished doing community service addressing graffiti problem... and grow up

VANDALS! Prosecute them - they are felons, should have criminal records, and made prisoners for as long as possible... years