There are two situations that really stand out for me as those moments as, hummm not sure I'm enjoying this. One such occasion arrived unexpectedly on the way home from Somerset a few weeks back. Google Glass had been navigating me home with some ease when I needed to stop for a comfort break shall we call it. I didn't want to leave Glass in the car as there is a high chance of theft at road side service stations and I didn't have enough space to hide it anyway after a weekend of Scuba diving. So I kept them on and raced into the male (obviously) WC and here I had my moment of - hang on I have video equipment strapped to my face in a convenience stop - now call me over zealous but at this point I immediately felt uneasy at the prospect of being challenged by a not so friendly technophobe at why I felt the need to wear them in such a place. Reality is I didn't need them on but had Glass been strapped to my face via prescription lenses I wouldn't have had a choice. For the months I have been using Glass I hadn't come against this scenario and then as I continued my journey I could think of other less than happy scenarios that Glass would be less than welcome.
So my question to Google would be how could they implement a retraction method, or at least a way of removing the prism or cover the camera for those moments when you just don't want to be seen wearing Glass. Personally a small design change that could see these uneasy moments disappear would benefit me and others in the same way, including maybe those places where Google is currently banned. Not sure I'm ready to make Glass a permanent feature on my Glasses just yet, and to be fair, I'm not sure society is too - which is one of the reasons why this product isn't on general release yet - acceptance is a long way off and that's from someone who went to great lengths to be an explorer for Google.