[lp4v4n]

I believe that most of what you said is true, but I don't think the tracking of people around the world is as efficient as your post suggests. If a single face scan were enough to track people anywhere like that, American government agencies (I'm thinking ICE, the FBI, etc.) wouldn’t have as much trouble as they do arresting people. That’s just my impression of course, maybe for some reason they choose not to use these technologies.

[peyton]

They need recall, not precision. It’s conceivably fine if you tag 100 people as long as one of them is your guy.

Also I mean you and I can recognize people we know. A surveillance camera has millions of sensors sampling every ~50 ms. It’s plausible.