But like any good privacy paranoiac, Kilpatrick can easily imagine how the face-tracking software he sells can be used for less benevolent purposes.

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We have spoken many times before about the strangely paranoiac public, political and media reaction to the sight of people trying to reach Australian shores.

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In fact, Sheen began to remind me of none other than Howard Beale, the paranoiac mad prophet of the airwaves in the classic 1976 movie Network.

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Again I felt a paranoiac certainty that in telling his tale Sigismund Blondy had enlisted me in a theatrical invention cast me in a role for the benefit of an unknown audience, perhaps only himself.

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And while I did enjoy skeet and target shooting when I was a kid at summer camp, I have never, as an adult, been a hunter nor do I suffer from any paranoiac instincts requiring me to install an armory in the family room because of a fear that my government might be thinking about coming to get me.

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