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The Times' year in ideas and the privacy/discrimination tradeoff

Swiss artist-inventor Annina Rüst] built a translucent leg band that keeps track of your electricity consumption. When it detects, via a special power monitor, that electric current levels have exceeded a certain threshold, the wireless device slowly drives six stainless-steel thorns into the flesh of your leg. “It’s therapy for environmental guilt,” says Rüst, who modeled her “personal techno-garter” on the spiked bands worn as a means of self-mortification by a monk in Dan Brown’s novel “The Da Vinci Code.”

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