I am always surprised at how "freaked" people seem to be at the prospect of answering questions. "That's not what our founding fathers set out in the constitution!"
Try looking at the previous census questions. They asked the head of household's name in the very first census in 1790. Why would they have done that when the constitution that they had written just a few years prior didn't say they could do this?
Look at the 1840 census... There were 28 questions!
Look at the 1850 census... People were asked about the value of the real estate they owned!
Evil, evil census takers.