A few years ago I dared to walk across the "live" taxiway at Farnborough. Tower spotted me and had me intercepted by "the land rover".
Nothing and I mean absolutely nothing was moving or running on the whole airport. No APU, no engine, not even a car with the exception of the land rover. So the taxi way was as dead as asphalt usually is...
Same place, at night, we parked for just a pax drop right under a light mast, I got out of the airplane, walk around the wing and open the hatch to the baggage hold, the land rover arrives (which I saw lurking like a beast of prey maybe 200 mtrs away)and starts to bark at me about the whereabouts of my vest.
Its these incidents that transform otherwise normal people into "mentally retarded half-wits who think they improve safety at these places" for me.