It’s a sign of the times: Security conference DefCon has added smart glasses to its list of banned audio- or video-recording devices. The organizers have said that, with no consistent way to understand whether smart glasses are recording or not, they have taken the step to ban them in their entirety on the grounds that they erode trust and invade people’s privacy. Putting corrective lenses in the smart glasses will be no excuse: DefCon insists that visitors bring a pair of glasses without the smarts instead.