Cindy Cohn of the Electronic Frontier Foundation said in a call today, "We find it troubling that copyright law is being invoked here. Microsoft doesn't sell this manual. There's no market for this work. It's not a copyright issue. John's copying of it is fair use. We don't do this anywhere else in speech law."
For example, in cases involving libel or trade secrets, said Cohn, "You go to court, you make a case and you get an injunction. You don't just file a form. DMCA makes censorship easy."