Except that this is about legal issues, since the complaints ignore simple technical solutions like wearing a mask. It is no different than demanding laws to p

Except that this is about legal issues, since the complaints ignore simple technical solutions like wearing a mask. It is no different than demanding laws to protect the privacy of your email because you are unwilling to use cryptography. As for expectations, nobody in any society where Glass is useful can claim to have an expectation of not being photographed in public. Google Glass relies on the availability of Internet access, which basically means a society where cell phones are common, and by extension cameras. People use cell phone cameras in a casual, carefree manner in public and private; Google Glass is no different.