“This may be the only place in America where Shepard Fairey, the street artist whose omnipresent portrait of Barack Obama has become a touchstone, is not fully feeling the love. Mr. Fairey appeared in two municipal courts here this week to fight a cascade of vandalism charges…. While this is not his first encounter with the police — Mr. Fairey has been arrested more than a dozen times for posting his art on whatever surface catches his eye — it appears to be his biggest legal tangle to date.”