Google:

Since the program started, our Explorers have gotten a lot of attention when they wear Glass out and about. Reactions range from the curious – “Wow! Are those the ‘Google glasses’? How do they work?” – to the suspect – “Goodness gracious do those things see into my soul?!” Luckily as the Explorer Community grows, so does their collective wisdom. We asked some long-time Explorers for their advice, and here it is.

While I dislike the condescending “goodness gracious” comment, the last “don’t” isn’t too bad:

Respect others and if they have questions about Glass don’t get snappy. Be polite and explain what Glass does and remember, a quick demo can go a long way. In places where cell phone cameras aren’t allowed, the same rules will apply to Glass. If you’re asked to turn your phone off, turn Glass off as well. Breaking the rules or being rude will not get businesses excited about Glass and will ruin it for other Explorers.