“As a city volunteer rolled dark green paint over a bright jumble of scrawlings and imagery on a fence at Warm Water Cove Park on Saturday, Paul Barron stood alongside holding a yellow sign with an ornately lettered message: ‘Celebrate Graffiti!’ ‘Painting over artwork isn’t gonna prevent any crime,’ Barron, who described himself as a professional muralist and graffiti artist, told reporters who had come to witness a culture clash on a balmy morning at San Francisco’s southern waterfront. ‘They’re taking away our voice … killing the only pure form of art.'”