I think it's about as concerning as cell phones. There are plenty of places where you are not allowed to bring a cell phone, especially if you're going to be lo

I think it's about as concerning as cell phones. There are plenty of places where you are not allowed to bring a cell phone, especially if you're going to be looking at or talking about something confidential. I think the same rules would apply to glasses. Both devices have a camera and can upload a recording to youtube or qwik or any other number of video services, and both devices can be used to secretly record videos. I hope that Google will take measures to reduce the risk of unwanted recording, perhaps by having an LED or a shutter/record sound which can not be muted.