I can easily envisage the scenario: The dad goes out with his son, teaching him how to hunt, and using a 22 rifle to hunt guinea fowl with. They see the guineas, creep up on them and the boy takes a shot. From behind some bushes they hear a loud shout, and go to investigate. There sits the father's loyal farm worker, with a bullet wound. He was not visible and no one expected him to be there. A great tragedy for all involved, and their families.
Having taken my kids out to hunt and shoot many times, I can see myself in their shoes. Freak accidents can and do happen. Not good for them, but also for all of us hunters and gun owners...