Not me, there are to many impostors out there...
Forget it not a chance it will get used, heck I'll more then likely cover the front facing camera anyways so it can't be used. Besides I can't stand the stupid lockscreen slider let alone having to put the phone towards my face just to use it.
My concern with using it is that it will be a major battery killer. Firing up the camera every time the phone is activated, maybe even if its in m pocket if a button is pushed. That seems like a terrible idea on a phone thats probably already going to barely get through a day especially with LTE turned on.
i wont use it in every day life since my phones are never out of my sight.
but when i travel i will probably use it. not a fan of pin lock so if it works, i would use it on occasion.