One of the most irritating myths promulgated by the entertainment industry is the idea that copyright is an ethical imperative because it's bad to "steal other people's ideas". This is frequently combined with an illustrative story of plagiarism -- in other words, a situation in which someone fraudulently claims credit for someone else's work. Of course, this is nonsense. Plagiarism and copyright infringement are two completely different things. Although they sometimes occur together, there are many examples of either without the other. And if your eyes just glazed over -- no problem: Nina Paley has made it easy with her new Minute Meme for QuestionCopyright.org, called "Credit is Due".
A few months back on Kairosnews, we had a long discussion with Michael Bruton, a representative of Turnitin, a commercial "plagiarism detection and prevention service." In short, the question was whether it was ethical for teachers to use the service, since it involves uploading students' essays into turnitin.com's database, where they will ostensibly be encrypted and then used to guard against their being used illicitly in the future.