Young people today lack even the "ideological baggage" to concern themselves with copyright as they go about appropriating images.

"They feel that once an image goes into a shared digital space, it’s just there for them to change, to elaborate on, to add to, to improve, to do whatever they want with it. They don’t see this as a subversive act. They see the Internet as a collaborative community and everything on it as raw material."

Much more here — including the discussion of a case in federal court brought by a photographer whose images were worked into collages by a painter who made millions of dollars and an iPhone app that automates appropriation and collage.