Sod's Law says that a rare event will occur when the system to detect or inhibit it - has just been manually inhibited due to a false alarm malfunction.
Tied down safety valves were responsible for boiler explosions on Victorian railways.
Owing to a faulty indicator - an operator manually overriding the automatic emergency cooling system was a contributory factor in the Three Mile Island nuclear reactor disaster.
https://en.wikipedia.org/wiki/Three_Mile_Island_accident
Biting the hand that feeds IT
