Do people honestly think that you have to get permission from the subject of a book before you write about it? What weird intellectual-property brainwashing must have gone on there.
And yes, forcing people to give away something they have worked for is robbery, and in my opinion morally wrong. If it were legal (which clearly it isn't) it would still be wrong. Just because something is legal doesn't make it right.
Trademark means other people can't start an encyclopedia and call it Wikipedia, or use the logo to imply the foundation supports something they don't etc. It doesn't mean you need permission from the foundation to utter the phrase, or write it down. This is a good thing. Freedom of speech, expression etc.
I'm a little frightened by some of the views in this thread... Seems like people, given a tiny pretense of ownership of IP will immediately take on the most extreme views. We aren't the foundation, and trademark law does not allow people to stop a open discourse about a topic. Thank goodness.