Google Glass is the future. Or it’s not. In either case, there exists a serious problem in the head-mounted wearables category that is already causing a stir: Anywhere, at any time, a person wearing Google Glass might be recording you or photographing you without your knowledge. There is no end in sight for this serious potential invasion of our privacy, but there are solutions that can help in some scenarios. Berlin-based artist Julian Oliver, for example, has created a solution that stops “Glassholes” in their tracks as soon as they walk into a room. “To say ‘I don’t want to be filmed’ at a restaurant, at a party, or playing with your kids is perfectly OK. But how do you do that