Personally, I also hadn’t even heard of these until now. Maybe they’re just not being marketed to the tech enthusiast crowd as we’re the sorta people who’d diss it for the privacy implication?

yet they didn’t bat an eye at the established creepers doing that already with smartphones

I don’t think anyone’s happy about that either, but the problem with Google Glass (and now even worse with the Facebook ones) is that they’re pretty damn subtle. You notice someone taking out their phone to take a photo of you, but just looking towards you with sunglasses on? Welllllll yeah.