The door to paranoia opens benignly-and early. just think of santa. he knows when you are sleeping. he knows when you're awake. he knows if you've been bad or good, for goodness' sake. And he knows these things all the time, even though you can't see him. Millions of kids all over the world happily and wholeheartedly believe in ubiquitous surveillance as a de facto piece of the annual Christmas present-getting machine. Parents just shake their heads in adoring wonder.

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