"Turns out there is a very unfortunate downside to using a biometric fingerprint scanner to lock and unlock your car doors: when thieves want to steal your car they’ll simply cut off the necessary digit and go to town." [some finger readers and other biometric devices account for this, and will check for blood supply as part of the evaluation; I'll be making sure that my next car has this feature, and has a big sticker saying so. - jeff]