Guerrilla advertisers and city officials are in a constant war, and the latest battle was waged Thursday over sidewalk ads for Dockers, which is part of Levi Strauss and Co. After spotting the illegal graffiti advertising on sidewalks in Hayes Valley and the Mission district, City Attorney Dennis Herrera fired off a letter to Outdoor Media Group, or OMG, demanding the advertising be removed and to “desist from further sidewalk vandalism.” Read More