Good for him. Most wouldn't bother standing so firm on principle, even if they knew they were not required to answer such questions. That is the trouble with the "soft police state". It is just bothersome enough to make your life uncessarilly difficult if you want to assert your rights, but it isn't yet so gung ho as to result in frequent clear abuses of the law and of civil rights.
Britain, France, Italy, New Zealand, Australia, etc. have been going through this creeping police state phenomenon for many many years now. We're still in the very early phases. Sadly, we're also much more likely to employ high technology to enact the police state in such a way as it will be far less obvious and oppressive feeling to the average citizen, compared to these other countries. Also sadly, I do not think Obama or the democrat congress is going to do a damned thing to put the brakes on it. Indeed, expect it to increase: "By making these new fangled full body xray machines standard across the nation's airports we'll be pumping $20 billion into the economy and lowering insurance rates for the nation's air carriers by hundreds of millions a year!" And of course look for the Health Care reform to be a trojan horse for unprecedented government encroachment into the way people live their lives, all in the name of our nation's health and cost savings (have to "pay" for that $1.6-4.0 trillion dollar price tag somehow). Much the same on cap-n-trade and the push for green vehicles, smart grid enabled homes, etc.
Sure, they'll may fake hay with a few high profile, low impact policy changes: GITMO, foreign electronic surveillance program, no more shampoo and nail clipper restrictions in checked luggage, etc. But the other hands of government will be busy seizing much more substantial power and levers for control of our country and our lives.
Sorry... Like I said, good for him. Me, I just stay out of airports all together if at all possible.