In other words, for every one time a Google Glass camera has been pointed at you, maybe a thousand smartphone cameras have been pointed at you. (I'm making these numbers up, but you get the point.)
When I'm wearing Glass, I'm not taking a picture of you because I have no use for a picture of you — and for that same reason I wouldn't take a sneaky picture of you with my smartphone.
And if I did use Glass to take a picture of you, chances are you'd know about it. I would have to either utter a pretty loud audible voice command, reach up and press the shutter button on top of Glass or wink awkwardly and in an exaggerated fashion. Then the glass would light up and the picture on its little screen would be visible to everyone in the room.
There's nothing sneaky about Google Glass photography. It's far more obvious than smartphone photography.
The bottom line is that there are many major, huge, colossal invasions of our privacy that we should all be up in arms about. But iBeacons, Gmail scanning and Google Glass are not among them.
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