“Whether it’s a simple, hastily scrawled tag on a laundromat’s exterior wall or an extravagant, “wild style” mural of cartoon figures and gigantic bubble letters sprawled across a factory facade near the freeway, spray-can and paint-stick imagery is a constant presence. At the low end of our attention meter, it teases, nettles and tingles. At the other, it blares out and demands to be consciously seen, whether in loathing, admiration, perplexity or some confounding amalgam of the three.”