If you've never heard of Banksy, you should have. Just do a quick google search, then a Youtube search and you'll see that he's the godfather of political graffiti. He does some pretty sick stencil work. He also has a book that's worth checking out, it's called "Wall and Piece".

This is a little thing he did with Paris Hilton's CD. He bought one, and reproduced it with edits to the images and tracks, and put them back in the store in place of the real CD. There's a video up on Youtube about it. You should check it out, and let me know what you think.