I have a couple of those type of switches, though smaller, in my parts bin. They were from some piece of surplus equipment that got junked. Where I've seen them used is in a crowded control panel where they might just get bumped. The two red plastic levers to the left are another type of safety switch: The lever is spring loaded, and covers the handle of a toggle switch.
In my view it would be quite hard to move them by accident, and probably not possible to move at once.
It would be interesting to know if the plane has any other switches of the same type, that are routinely activated.