It's putting words in someone else's mouth. It's also important to note the difference between non-fiction and fiction. Anyone can take the facts from my book and reuse them. They can put a different spin on them or use them for different arguments or different conclusions. The facts are free already even if I choose the most restrictive use of copyright around.
Fiction is different.
The argument for open sourcing fictional characters is much stronger. Many of the major studios and content factors look the other way when fans write new stories with famous characters. There is also a permanence to a book that is strikingly refreshing. Webpages are just too mutable. At times, this can be slightly creepy and pretty Orwellian.