Ah!
So we're relying on the cashier to care deeply enough to do this validation.
Remember the phase when credit cards were being issued with a picture of the card holders face on the front? And all the stories about the card with a picture of a petite Indian female being used by a large white male to ring up purchases?
I like the concept of Square, and I'd like for this to work. But the cashier being a face-recognition gateway seems like a horrible idea.
