Hey, that's bloody brilliant, really. If nobody can see the pictures, it means they don't actually have to work. Your error rate drops to whatever passes for ne

Hey, that's bloody brilliant, really. If nobody can see the pictures, it means they don't actually have to work. Your error rate drops to whatever passes for necessary theater--just enough false positives to keep the baddies out. Decades later when the scared public shows up with cancer lawsuits, the device manufacturers stage the grand reveal: it was just a proximity sensor, prng, blinking light and siren. I mean since the "real" devices are so easily circumvented by a determined traveler, why bother. Best. state. secret. ever.