In addition to the Four Rules, store firearms and other weapons where they are not accessible to unauthorized persons. Guns are not boxes of Kleenex and require a higher level of security for their storage.
My personal ongoing data gathering indicates that every single day, on average, a child gains access to an improperly stored firearm and then incurs or causes a gunshot wound. While this is small number compared to some other types of ‘accidents,’ the other types don’t generally result in large amounts of blood that has to be cleaned up. The level of psychological trauma to the responsible parties cannot be imagined by the rest of us.
The saddest aspect of these incidents is how preventable they are. Numerous easy and inexpensive ways to secure firearms either at home or in a vehicle are readily available. There’s no excuse for not using them.
The balance of the post is on my Patreon page and is publicly available.