Actually, is it graffiti or is it art? These figures appear randomly. Obviously this one's on the street. I like it a lot, and am happy to see it every time I cross that street. I once in a university level photography class took a photo of a message someone had painted on the sidewalk, and there was much discussion about why I took it. Sometimes graffiti like that (that makes you think, or at least stop for a second to think) I think is useful.