Barry Hoggard posted a photo of a modified Aakash Nihalani piece in Williamsburg to his Flickr account yesterday:

aakash nihalani

When I saw this, I realized that street art is the original Creative Commons. Put something in a public space and it just begs for “collaboration,” resisting any claim to copyright. (Yes, I know that Creative Commons is not intended to do away with copyright but to make it more flexible, and that street art is more like a perpetual public domain).