Friday night club shoot, large open room, lot of firearms out, lot of activity, everybody on alert for actions open, magazines out... Generally only .22 used the entire evening, but occasionally some will use bigger calibers for poker card shoot. We will occasionally have missteps, usually simple mistakes like not totally clearing a weapon, but there's enough people around that keep a constant vigilant eye. I'm sitting at the end of one of the tables doing scoring for the event, when one of our younger members (early teen?) is told by his dad to put the firearm down and not touch it and walks away to talk to another member. I'm writing down the scores and I hear a magazine installed and as I'm looking up the slide is released. I yelled out STOP, PUT THAT DOWN... especially since the muzzle was pointed straight at me. Dad definitely took over and was dressing down the kid while he packed everything up and they left. This was two weeks ago, they didn't show up last week. If they show up this week, I'd like to be able to turn this into a teaching event and discussion, but I also don't want to turn either dad or son off. Suggestions on how to approach this conversation?