Colorstalker has a crazy set of photos over on flickr of Street Runes, those legal graffiti scribbles that have multiplied dramatically all over the city's streets the past few years. Looking at these pictures bring to mind two questions: Anybody know what half these things actually mean? And "how did civilization manage to survive without day-glo spray paint?"

Photo by colorstalker via Contribute (11,284 photos and counting!).