What lawyers can learn from comic books

In Copy cats and robotic dogs [Red Herring], Professor Lawrence Lessig discusses Temple Law professor Salil Mehra recent Rutgers Law Review article which details different approaches to copyright in Japan and the United States. Specifically, it addresses original v. amateur, read copycat, comics: "Mr. Mehra demonstrates, that this copycat market fuels [the] original art demand that otherwise would not exist. The "use" of this copyrighted content therefore benefits the original author" when viewed from a business, rather than a simply legalistic, perspective.

I think I remember reading about something like this, as pertaining to the U.S., at Chilling Effects.