Graffiti/tagging: A "progressive" art genre

Justin Bieber himself is a vandal 

In a story in this morning's Chronicle (City wants label to pay for graffiti Bieber ads):

[City Attorney] Herrera has been working with city leaders, and San Francisco Supervisor Aaron Peskin has legislation in the works, to crank up penalties for those engaged in unlawful guerilla marketing tactics, the city attorney's office said Monday.

Maybe Peskin is forgetting that graffiti is considered an art form by his "progressive" comrades, Matt Gonzalez and Tim Redmond.