Comment by Stefan-H

This mentality is patently wrong to me. You have to realize that maintenance, house keeping, and any manner of other people may enter your area(either legitimate people, or people in disguise). Additionaly, if I were to "go rogue" you better believe I would take advantage of being able to frame someone else and remove attributation from my shoulders. The in-office risk asside, you are also training terrible habits. These habits could lead to your employees leaving their computers unlocked in coffeee shops, at conferences, in their hotel rooms, etc. You have to instill the habit of if you are leaving your computer, you lock you computer into people and make sure they understand why that is.