I have been to many hunts observing many guys pointing their guns at others, especially coming back to the blind after retrieving a duck, stomping in the mud.
When I told them about it, their reply was: its on safety.
Oh, good, so my life depends on a 1/64 th of an inch safety pin thinghy now, awesome!
Never point a gun at others, even when empty.
Another big no no, is when fellow hunters are asleep in their layouts, when that happens, i take their gun away from them.