But Google’s Chris Dale says the device is designed to address that concern.

“In order to activate the camera or to record the video, you have to take an explicit gesture or say something out loud. So I tap, I activate the device, and say 'Okay, glass, take a picture.' Similarly, I have a little button on the top here that I can push that will again show an explicit gesture to everybody around me that a picture is being taken and a video is being recorded,” he said.

Filmmaker Chris Barrett showed just how easy it is, though, to record people without them knowing. His glass captured a man getting arrested after a fight at a fireworks show. He posted the video to YouTube.

Mike DiGiovanni created a way to take pictures with just a wink.

Hackers have been able to get facial recognition technology to run on Glass. The technology can scan a face, identify the person and provide information about that person. Google says it will not approve face recognition applications.

Consumer Watchdog’s Simpson says it may be up to Congress, however, to protect people’s privacy.

“I think it is going to require some serious legislation. We are going to have to pass some laws,” he said.

Dawkins says privacy concerns will be a part of her classroom discussion, as she uses Google Glass to enhance her students’ learning experience.