I suppose such a kill switch could work, but it really depends on the training of the people who would pull that switch. Would they do it as soon as polite dud

I suppose such a kill switch could work, but it really depends on the training of the people who would pull that switch. Would they do it as soon as polite dudes in suits walk in? Would chaos ensue if the switch were pulled in a false alarm? If not, then it's "reversible" and an employee could be coerced into flipping it back, right?