The problem is not with the rights .
Attribution is very important.
I've not heard any arguments that says it should be okay for me to put my name on Shakespeare's works and then attempt to collect royalties from every college production of Hamlet. You put your name on someone else's writing, print it out, and hand it in as your own, hoping the boss or teacher won't notice. That's wrong and unethical with or without the Internet. You put your name on someone else's Web page, carefully take out every indication in the code that someone else had anything to do with it. You then post the page to your Web site and take credit for it.