Even if you are careful, all it takes is a kind friend on a site like Facebook to tag you in a photo (you don't even have to be a member to be tagged) and you are back to square one.

On the upside, I am super excited for Facebook Goggles. Augmented reality profiles shown for everyone you look at. Out in the dating scene? Know who is single and who is not just by looking at them. Business convention? Find out who everyone works for at a glance. Okay, maybe it isn't an upside, but it is bound to happen anyway.

It's exciting and also deeply disturbing. I agree with all the positive benefits.

But after a while I think there's a real tendency to just reduce people to a set if metrics in your mind. It seems scary to me that the more "connected" we are we are often just self-selecting or being selected into some group based on patterns.