[itishappy]

> it's harder to kidnap someone and use their eye, as opposed to steal some other piece of identification

Is it? I use my eyes a helluva lot more than I use my government issued SSN. In fact, I've only taken my physical SSN card out of storage once, but I stare at random (potentially camera equipped) stuff all day. Of course you can still steal it from me by pretending to ask for ID, but that's true of my eye-print as well.