Re: I may be weird, but...
"Point being it would take deliberate collusion and just not a normal confused cock-up to send a false alert."
Not necessarily. Never underestimate Murphy. We don't know if there is a "break glass" scenario for the unlikely-but-not-impossible scenario that all three executives (and anyone else with the possible authority) can be dead, unconscious, or otherwise incapable of performing the duty at the same time. The Hawaii scenario along with many other faultless engineering disasters show it is possible to "thread the needle" and bypass every single failsafe and still fail spectacularly.