"You've never seen a viral video of an ordinary person doing something really stupid? I can think of many."
And not one was recorded with Google Glass.
"Someone wearing Google Glass (and constantly recording) catches you saying or doing something that sounds incredibly funny/offensive/strange, they post it online, it goes viral, and suddenly your life is different."
1. You can not constantly be recording with Google Glass the battery will last only about an hour.
2. Incredibly funny? Not a problem. Offensive? I try to never be offensive in public or private. Strange? Yea I do that all the time. I have discussions about physics and other strange topics.
"Sure it's unlikely but the threat is there. I'm not going to be nearly as comfortable having a conversation in a restaurant when I know people are recording because there's an extra filter all my words have to pass through."
So I should not be allowed to use a piece of tech that I find useful because their is a very unlikely chance that someone will do something in public that someone records and posts to the internet?
Really? You want to take away that right from me just to provide you with no real protection from an unlikely event since the same thing can happen with smart phone.
And here is the best part...
"I'm not going to be nearly as comfortable having a conversation in a restaurant when I know people are recording because there's an extra filter all my words have to pass through.""
Good, you should have that extra filter on in public because you are in public. You should try to not be offensive in your speech and behavior. That is called manners. You never know when you are acting a fool in public when someone you know might see you or frankly anyone might take out a cellphone and record you.