Thanks Meter 37
Join Date: Jul 2005
The 2ndary line of protection (pattern unlock, pin, etc.) is just for conditions where the face detection won't work. Try it in light situations that are not broad daylight and you will see that this is an obvious shortcoming of face unlock. There is no front flash, and if there was I would not like to be blinded by it so if it fails to detect your face / any face at all it will just ask for pin/pattern.
HTC Desire HD
HTC One S (black with no MAO defects, unlocked, rooted, self-modded mostly stock ROM)
Help populate the HTC One S IRC channel on freenode: #htc-one-s