People have been getting more risk-averse, as well as nosier over time. Both of these changes increase the push for surveillance. I agree with your intuition that people shouldn't have to worry about being constantly monitored, but if you look at the recent internet pile-on after both the Coldplay concert and tennis match incidents, I am not sure the (voting) public agrees.

>"Democracy is the theory that the common people know what they want, and deserve to get it good and hard."

-H. L. Mencken