I've never gone through anything like this but I get taken aside for increased security checks about 80% of the time when I travel. I'm 3rd generation US citizen but my mother is of mexican decent and my father German. Phenotypically, this must equate to "crazy looking terrorist guy" because I almost always get searched. The last time, they swabbed all my belongings and ran them through some machine to make sure there was not any trace of explosive. Really? Me? I'm a lover, not a fighter.
Do you really think it will come to this? Did you happen to read the news story of the man that was wearing his "camera glasses" in a McDonalds in Paris and was accosted by some employees there? Do you think these types of glasses (or the equivalent) will someday be the norm? If so, what does this do for society? Will it make people more tolerant, more "honest", knowing that their every action is documented?