Re: no prizes for good guess
Well-designed, critical systems usually have hard limits built into them so that such a thing can't happen - not without someone going out there manually (with appropriate tools) and taking the situation in hand, anyway. For fluorine/chlorine and such, I would generally expect such a system to either just reject a "dump everything" command, or to merely increase things to a higher but still relatively safe level - whatever the hard limit restricts it to.
Biting the hand that feeds IT
