The Existencilist...

Anonymous British graffiti artist, Banksy, is one of the kingpins of "Brandalism" a movement which reclaims free speech, people power, and public spaces through illegal and provocative stencil art. London in this case, but could be cropping up in your town too. Part activist and part prankster, Bansky's motto is:
"It is easier to get forgiveness than permission."