You should have said something. Shouldn't have been a prick about it, but you should have definitly spoke up. I don't care what age the people shooting or standing are, all it takes is for one stupid mistake for something serious to happen. Anything as stupid as a string breaking and sending an arrow flying, or a nock falling off to send the arrow in a different flight. I've seen both happen at the range during league, it isn't worth it.