[skore]

The problem is this: What if I don't have an account, but somebody still happens to tag my face with my name, for whatever reason?

I know that this is mostly about facebook users, but seeing how much facebook spam I get trying to incite me to join in, I could totally see them go this route - Encourage people to tag friends who aren't on facebook and thus give those friends no other choice but to claim their identity.

[tlrobinson]

I'm only talking about faces tagged with an actual Facebook account.

It's unlikely they would enable facial recognition for non-Facebook users. How will they know the difference between two different people tagged as "John Doe" if they're not linked to a specific account?

[sp332]

By their faces! Also gender, location, preferences, web pages visited (they still track your browser even if you don't have a profile), and by the networks of people who talk about them.

[jrockway]

This already happens. When someone goes to your neighbors and asks around about you, your neighbors probably spill everything they know about you immediately. (If not immediately, a little story about an "ongoing investigation" should push them over the edge.) It's going to work the same way on the Internet. It's a little scary, but I prefer to think about the good applications rather than the bad applications. Having realtime facial recognition at conferences, for example, would make my life a lot easier.

[vecinu]

Having realtime facial recognition at conferences, for example, would make my life a lot easier.

This is an advantage? This is what you're willing to give up your privacy for?