Supertouch has a little response to the infamous article questioning the validity of the work of now unquestionably famous artist Shepard Fairey (Obey Giant). The original article, written by artist Mark Vallen makes accusations of plagiarism and states several examples. Supertouch claims the appropriation of other imagery has been an artform/movement in and of itself for a long time now.
Read up at Supertouch and see how you feel about the issue. With the internet making so much imagery so readily available now this is not something that is going to go away anytime soon and will most definitely continue to be a hot topic within our profession. I myself appropriate imagery into a lot of my work.
So leave a comment and spark up some debate. Let me and the other readers out there know what you think about this. I think it really gets some people ruffled and I also think there may be a generational divide shaping up here because I definitely see a lot of younger designers and artists appropriating imagery more and more.