Exactly. "Take a short shower, otherwise the base will be out of water in 3 days" usually works well.
Of course, there is the Deid...which is 20 miles away from a metro area of nearly a million people (or more), so it's pretty hard to take their water rationing seriously.
In any case, much like the reflective belt and uniform police, violation of an AFI, rule, or policy does not give people justification to act like an asshole and/or be disrespectful. Especially to someone who outranks them.