This article asks the over-simplified question, "Are property rights in ideas unethical?" The article is flawed, but worth reading. The author concludes that the IP system should change somewhat (how he doesn't specify) to accommodate free content. However, he also holds that free content is inherently dependent on proprietary content. I pointed out that free content existed before proprietary content (think of cave art or ballads, just a quick example), that proprietary content often uses free content itself, and that much free content is now actually built without proprietary dependencies.