Isn't this already the case with small cameras?
What happens when someone zooms in on sensitive data in a company or home or anywhere you can think of.
The more Glasses you have, the less control you get.
The point is that no matter what alert signals you get, you can't just beat/accuse someone just because he is recording.It's a two-way street.
We will see.
Just because Glass' prism is lit doesn't mean someone is recording. They could be looking at something else.
http://blog.stephenwolfram.com/2012/03/the-personal-analytic...
It offers great insight into how he lives and works, and that is just from the analysis of his historic email, (rigorous!) calendar appointments and phone call metadata, not their actual content!