I don't know that withholding your fingerprint to keep your phone locked would work, anyway. They already have my fingerprint on file, and likely most of everyo

I don't know that withholding your fingerprint to keep your phone locked would work, anyway. They already have my fingerprint on file, and likely most of everyone else's, in the DMV records. I'm not sure if fingerprint scanners have been defeated using ink prints yet, but it's just a matter of time, I suspect. Fingerprints are established as identification, which makes them necessarily not private/secret.