Action vandalism with graffiti

Many cities beefing laws to fight against graffiti. In San Francisco, California, for example, current owner has 30 days to clean up graffiti on their property or face paying the city to do for them. Inevitably, the question will arise when the graffiti art?Some famous graffiti taggers have been accepted by the art world. The most famous is Keith Haring, whose work has sold upward of $