[joe_the_user]

I don't believe that dollars are an appropriate unit of measurement for life experiences. I do believe that graffiti and others forms of street art are intentionally impermanent and functions of their location.

But Banksy isn't graffiti in general or something other people decided was worth money after someone just did it for joy. Banksy's shtick is calculated to generate publicity and a whiff subversion specifically as a part of him maintain his position as a highly paid, highly valued, highly publicized. Banksy could have gone to NYC and done anonymous graffiti for year and no one would have notice if there wasn't any publicity.

[twoodfin]

Unlikely. His shopworn "social commentary" is typically a dead giveaway. ("I remember when all this was trees.")