Guerrilla artist Poster Boy razors away parts of subway advertisements and sticks them onto other subway posters. The end result: funny social commentary, often involving the unfortunate use of celeb's faces! New York magazine talked to him about why he does it: “No matter what I do... as long as I did something to those advertisements and that saturation, it’s political. It’s anti-media, anti–established art world.”

But by the spring he was incorporating social critiques, rearranging the Iron Man logo into IRAN=NAM, and altering an NYPD recruitment-drive poster to read MY NYPD KILLED SEAN BELL. “No copyright, no authorship,” he says. “A social thing, as opposed to being an artist making things for bored rich people to hang above their couch.”

Very high-minded! And then there's this:

How Poster Boy Turns Subway Ads Into Political Art [New York] [Photo: Poster Boy's Flickr]