Maddd Science Fanfic — however you spell it — is a great example of the anarchic, copyright-exploding power of the open internet. It's how fans spell out in detail exactly what their creators are missing about a story, while mixing in their own expressions and opinion indiscriminately. It's a massive but under-acknowledged community. At least, that's my take... I wish I knew more about it, which is why I like this first article as an intro.