I have seen technologies like this in movies and I have seen how people have even used it against the owner, although the crime rate that would be involved with facial recognition cannot be as high as that of finger print, codes, password and the rest.

Facial recognition may still be risky, but it could actually be the best, because it would be impossible to clone the face, and the highest a criminal can do is to force the person to use it against his will which may not be much common, and you would not tell me that people would cut people's head just to get it done, where would they carry the head to and how would they do that without being notice.

I think facial recognition would really be a nice solution, but they should never make it like the only thing that would be relied on, it should still have another form of verification along with it.