Yes, accidents do happen.
But if you adhere to the safety rules, just four of them, you cannot have an accident that is not an equipment failure.
I would be willing to bet that in every single instance you know of, at least one of the four fundamental rules were broken.
Yes, two of the three were blatant safety violations. I did not hear the details of the third incident. Only that someone shot the floor in front of the locker.