> You fingerprint yourself in every restaurant with glass cups, and leave those prints behind when you depart. By your reasoning, you also leave your fingerpri

> You fingerprint yourself in every restaurant with glass cups, and leave those prints behind when you depart. By your reasoning, you also leave your fingerprints on the number keys you press at the ATM when entering your PIN. So your bank PIN, by your logic, is also no more private than your fingerprints or your hair color, correct?