I don't know about anyone else, but I love doing this kind of stuff. I often Photoshop photos of my mates. Here's a competition to deface some famous pieces of art, and they're hilarious. They're are really well done as well. I found it through another useful blog I visit regularly. There's a lot of interesting media related articles on that site.

If anyone's done any good photoshop jobs like this, show me, the world needs more of this.

Alternatively, this is really immature and I'm an idiot for liking it.