Thread: Muppets walk amongst us

Two days ago I was in a well known Rangiora sports shop. In walks a well known North Canterbury identity - (in fact an elected Councillor of high office), removes a rifle from a gun bag and places it on the gun counter action down and not visible. The rifle was placed so that the muzzle pointed directly at a woman standing at the general counter.
I commented to another customer whom I know " look at that muppet, his rifle is pointing directly at that woman". The other customer replied " perhaps that's his wife " ?. When the rifle was lifted up I could see that the bolt was in it but was open.
I feel a bit slack for not immediately intervening and telling the guy his firearm was not pointed in a safe direction. What is the appropriate step when we see this happen ?