One freezing cold evening, an officer colleague of mine was called to Sqn. Ops "to report to" a junior RAF policeman who objected to my colleague's car engine being left running to defrost the windscreen. He was given a dressing down by plod junior in front of all and sundry and was told he was being ticketed.
Very disgruntled colleague, driving past guardroom the following evening, noticed an RAF Police landrover parked outside, all by itself with the engine running. Colleague pulled up, marched over and switched off its engine, removed keys and stormed into guardroom, to be met by....... guess who?
The same little 'erbert. What was his excuse? He was defrosting the windscreen! He didn't get the keys back. Colleague called OC Plod who eventually turned up and had a serious word with his protegee.