Just like the "big red button" on the old IBM system 360. It was a pull knob, but if ever pulled, required an IBM CE to come out and reset things, plus it could do some damage itself since it did an immediate power down of everything.
Sooooooo... Companies got quite bent out of shape if someone pulled one since their system was down for the count until IBM showed up.
And as you say.. Red seems to attract a kids fingers like a magnet