Destructive graffiti campaigns are being waged by anonymous taggers, deliberately defacing many of the meticulously painted murals that illustrate San Francisco's streets.
from CNN.com - Travel http://www.cnn.com/2014/09/03/travel/san-francisco-graffiti-war/index.html
from CNN.com - Travel http://www.cnn.com/2014/09/03/travel/san-francisco-graffiti-war/index.html