I'm sorry, but I don't believe I know you. And unless I'm mistaken, you don't know me. So therefore you have no idea as to how I work or how I think. Shooting you is simple, inefficient, and above all, dull.
When I punish a Guardsman, I make a point of it being complex, efficient, and exciting. For example, I could have you cleaning the latrines for the next few months, during which time I will usurp control of the kitchens and start demanding they make certain foods specifically designed to make your job a living hell. Also, you will sleep and eat down there (assuming you have cleaned them enough to clean them enough to eat out of, otherwise you will go hungry). And if you decide not to do your job and let the shit pile up around you, then I will bring you out into the main area, strip you naked, and have your genitals lashed with an electrowhip for everyone to see.
Do I make myself clear, soldier?