As biometric sensors find their way into your consumer devices, you will be tempted by your device manufacturers and app providers to use them for authentication. While I won't tell you, "Don't do it," we will discuss the consequences of using biometrics for authentication, rather than identification. There are plenty of inventions that turned out to be bad ideas, or are simply misused. Without a course correction in the consumer world, biometrics are rapidly headed in that direction.