JL: I don't know, it may be within Damien's right to do this, but sometimes these things need to happen in order to see the bigger picture, or to be able to look at it from a different perspective. This is Damien's karma being played out.
 
The thing that does surprise me a little is that Cartrain used his work in graffiti based prints and in collage based works. He did not claim that he came up with this diamond skull idea or anything to that effect. He did not plagiarize it or copy it, or imitate it. He incorporated a photographic representation of it into one of his own original artworks.
 
It's a little odd because there is a 100 year old tradition in art in making satirical and critical based art work like this going back to the Dada movement and even before this to Picasso and Braque. I see this as a photographic digital based new media collage (from the French: coller, to glue).  One has to keep in mind that a traditional collage is made from an assemblage of different forms, thus creating a brand new whole. What Cartrain created in effect was something new.   

Therefore, a collage work may include newspaper clippings, bits of colored or hand-made papers, portions of other artwork, photographs  etc.,  glued to a piece of paper or canvas. These days new media artists do not just use glue but also achieve similar results using Photoshop. They cut and paste images and words and then also digitally paint on top of them. Actually, this type of satirical works goes back to a group called the Incoherents, even predating Marcel Duchamp's Fountain by 37 years. see here