Threatening to punch anyone they see wearing them in the face isn't bullying; is that what you are trying to say?
Your hyperbole is showing.
That's not exactly hyperbole. Consider some of the comments in this thread alone
Can they capture the full wind-up and followthrough of SnapChat glasses being slugged off someone's face?
Does it come with a disclaimer that says.. "When you get punched in the face because of these glasses, and you will get punched in the face because of these glasses, you cannot hold SnapChat legally responsible because you are an asshat."
If a person wants or expects privacy, I believe that the onus is upon them to take measures to sufficient degree
They do. They beat the crap out of glassholes. Sufficient measures thus taken, effective privacy is restored.
Some people seem to have no trouble advocating physical violence against people merely for openly carrying a camera (which seems silly because if you want to surreptitiously record people there are plenty of ways to do it that are much less obvious). I hope this is just a case of people "being tough on the Internet", but even so, the ferocity of the response seems totally out of proportion.