my reaction when people look at me while wearing google glass is, "please get that camera out of my face." i find it unnerving and sorta creepy to have a camera pointed at my face, and to me, while the glass is not just that, it is still a camera.
If someone is using good DSLR to capture you on your dinner, you're probably a celebrity and used to such things.
The idea that the person across the table have a recording device, and every second of our conversation can be scrutinized later or posted on some social network is very unnerving and mood-killing. I don't dinner with people with smartphone turned on to capture every spoken word for exactly same reason.
With Glass they would have to be staring at you in order to do that. Your criticism doesn't match the product. If someone wants to record you in the way you describe, they will probably use a hidden camera rather than something as obvious as Glass.
So? With a camera they also have to sort of point it at you. Your second point, the problem is: if someone is wearing glass and talking to you, they can record me in the same way. So Glass will force me to be suspicious of everyone wearing it, and this sucks. Imagine if you were talking with someone and they were holding a camera to your face, but, you know, they said "don't worry, I'm not recording", yet they kept pointing it in your direction. It's pretty unconfortable.
You are captured thousands of times a day on CCTV, even if you have done nothing wrong these images can be stored. Data protection means nothing if you never know about it!
This resistance comes 'mostly' from the older generation, look at generation X, your kids. They give information freely, its a natural part of life their life, daily!
When I can walk out of my door and thousands people are feeding information 2 miles away about traffic on route to my work, or predictions of flu outbreaks are spotted before then happen saving hundreds of lives. This is a world where closed minded people don't guard information like there are special. A would where people give information to help others! The world is currently like China, closed minded and guarded. Role on generation X!