Re: "Unplug it and see who bitches"
Building Mangement used to periodically come down from their ivory tower and go round empty offices, unplugging unused devices and cabinets and sticking notices on them so the poor sap who had just taken the day off knew who to complain to.
Unfortunately this occasionally meant they got locked in a building with no way to phone home as the 'unused' (ie "it didn't have any lights on") cabinet contained the modems/routers/servers feeding the local building services... like entry systems/alarms and phones