Re: Well, no I'm not in favour of thumping people as a general rule but.......
I think the rule is that it's unfair to hit someone who *needs* to wear glasses. I think hitting someone who wears glasses for no reason other than fashion has always been obligatory.
(This still applies to Google Glass, since as the reviewer points out, their practical use is near nil. People only wear them as an attention-seeking device.)
@AC: You know perfectly well that there is a difference between someone taking a picture on their smartphone in which you are an irrelevant part of the background, and someone walking up to you, holding a camera in your face and deliberately recording everything you say and do. This is what someone who does not remove their Google Glasses is doing.