I get the point you're making. But if you're in a public place in the US or UK, you have given your consent to be recorded. The difference between Glass and smaller, less conspicuous recording devices is that with Glass at least you know there's the possibility of being recorded by that person (same way with cell phones). If someone really wanted to record you without your permission, there are cheaper and sneakier ways to do it. Also, it's not that hard to pull out a phone and pretend to text while actually recording video. No one would ever know.

So the idea that people wearing Glass are assholes is a ridiculous notion because there are already numerous ways to record someone without explicit approval, you already have the right to record anyone in a public place even without explicit permission, and it's already possible (and already happens) with existing smartphones. So if you're getting mad at Glass wearers for something that people are already doing, you're the asshole. The only difference between Glass and other technology is that Glass is newer and less common. That's it.