Do you like graffiti? Asked in polite company, the simple question prompts reactions as colorful as an art store’s spray paint section. “I love it!” someone suspiciously prideful of his New York City years might declare. “It’s a shame that subway cars, long coated with a graffiti-proof glaze, don’t roll with the Wild Styles of the 1970s and 80s — a carousel of color and defiance, winding through the city’s tunnels and elevated platforms, a living art show.” Others might guffaw.