The one and only time I took one of my cousins shooting he thought he had just emptied a magazine by firing all the rounds. He went to hand the gun back to me to reload it and he pointed the barrel directly at my chest with his hand on the grip and finger in the trigger guard.
I immediately said don't move or do anything! I sidestepped, grabbed the muzzle and pushed it towards the floor. I took the gun from him and it was empty, luckily. As he was a new shooter I scolded him on his "technique" and said never point at gun at anyone unless you intend on using it.
Never have taken him back to the range and likely never will.
Last time I was at my LGS there was a new clerk that would not check the gun before handing it to me. I was a little annoyed.