There is a rule forming though convention on these threads.
Basically it is, once you have established it is dangerous, try to find ways to either improve the dare and alter it so it is safe (this can include clarification) or stop going on about it and let people make their own mistakes.
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As i said previously the danger of the mouse trap comes if it is allowed to be triggered, from a position of where it is held back and then released. It breaks the backs of mice because of the speed of impact. It is not the pressure from the spring applied evenly over a constant amount of time that does this.
The dare asks that the trap be put on the balls, no let it slam. Yes letting it slam would be very dangerous but i see neglible risk in just pulling it back far enough and letting it apply pressure.
seen plenty of porn from a company i trust not to fake things like that with it