Going back to what bbforks was saying about cameras and the effects of knowing the employees are being watched. Some years ago i installed a shockwatch system on a unit and it had the lil keypad so the operator could enter their code. Just so happened on this paticular brand of shock watch there was a little circle that looked like a camera lens. After installing it i had to show all the operators how to use the system. Just joking with them i said the lil circle was a snapshot camera and it stored the picture of who was driving when the watch was tripped. Needless to say the operations manager never had to reset the system once.