That's unnecessarily restrictive and short-sighted. Guns and ammunition that are stored separately under lock and key with trigger locks are very safe. Also, children should be taken to the range when they are old enough and be taught how to handle firearms safely. When I was about 10 my dad taught me how to field strip, clean, lubricate and reassemble his M1 carbine. When I could do it practically blindfolded while handling the gun with respect and with full awareness of muzzle direction, he took me to a local sand pit and taught me how to load the clips, how to chamber a round manually, how to sight on the target, and finally, how to release the safety and fire the gun accurately. After every lesson, I verified that the gun was empty, packed the clips and ammunition boxes, and when we got home, I broke out the cleaning rod brushes, rags and oil, and cleaned the gun thoroughly before putting it away. I never handled guns without permission until I was old enough (maybe 15 or so) to go to the sandpit myself after school with my own .22 rifle and practice. Although I learned to shoot initially with a semi-automatic carbine (the M1), discipline was drilled into me, and for decades I have hunted with either a lever-action Winchester loaded with a single round or my single-shot Ruger rifle. I will not take a shot at a deer unless it is a guaranteed kill.
Some non-gun/anti-gun people like to characterize gun owners as macho, aggressive, etc. This is far from the case. My nearest neighbor is a church-going family man whose adolescent sons say "yes, sir", "no, sir" and "please" and "thank you" with numbing regularity. They are happy kids, and he regularly works with them honing their archery and shooting skills. When he said that I could use his range any time I wanted, I brought up a couple of bricks of .22 LR ammunition for his boys as a "thank you". He was grinning from ear to ear as his boys thanked me very politely and asked for permission to break out their rifles to practice. He's doing everything right - reminds me of my dad's military-inspired discipline with firearms. His kids have the safety drill down to a T. When a family from their congregation showed up to sight in their new hunting rifles, the boys patiently explained to their teenage daughter that she could only release the safety of her rifle when it was pointed down-range at the target area with it's earth-berm backstop, and they explained that shooting at a bank that contained rocks could result in ricochet of bullet fragments. Their father covered all this and more again with the whole family, but I was impressed with the seriousness and the level of understanding that these young fellows exhibited. I could have given the same talk at their age, too. When I was their age, I once lectured my great-uncle about firearms familiarity and muzzle-safety after he did something that I realized was very unsafe. He had bought a new lever-action rifle and had no idea how to load it safely and we were about to embark on a deer hunt. My dad listened, nodded and asked me to show my uncle how to safely load his gun. I did so, and then he sent me across the road to a beech ridge about a mile in the woods and sent my city-slicker uncle in the opposite direction.