You do not have control over ALL variables....just not possible. I agree that this should not happen again, but to just throw stones at the staff saying they should have known this was going to happen or they should know better it just ridiculous. Things happen and sometimes you do not know they are going to happen until they happen. It is tough that two kids had their body react they did. Frost coming out saying they did evaluate the players and dialed it back a little, they had training staff in with the kids and coaches, etc should be enough for you to know they took precautions toThey will learn from it and move forward.