Joe Kinsella posts a diary of his first day wearing Google Glass:
Before heading into Boston I stopped at a gas station. While pumping gas, one of my contact lenses bothered me, and I instinctively winked several times. Since wink detection was enabled, a few seconds later, I was the proud owner of several photographs of the gas station and the pump. ;)
I am not sure if wearing Google Glass is legal in Massachusetts. I can say the distraction was nominal though, since the directions were voiced into my earpiece, and the map only appeared on the heads up display shortly before the next turn.