The warning sign is to protect the children.
Well, as long as it's for the children it must be good.
I used to spend lots of time at the house of a neighbor with lots of children and even more guns and ammunition. All were easily accesible and all the kids knew better than to touch any of the guns without permission.Those were for huntin' squirrels,'coons, and not for play. It's the kids that were never exposed to guns that are most dangerous due to ignorance.