So recently a group of my friends and their kids all got together, and we decided it'd be a good idea to introduce them to games. We tweaked the rules a bit to make things a bit more understandable for the kids since they were all between the ages of 6 to 8.
Everything was going pretty well, us adults were giving advice occasionally, we were all having a lot of fun. It was being run by one of our friends who didn't have kids, who is normally pretty chill.
The kids group ends up facing an orc chief who wants to destroy the nearby village. One of the kids wants to talk to the orc to convince him not to. The DM looks at her and tells her that's a stupid idea and asks her if she really wants to try. Her dad encourages her to try it. The DM then had her character killed and explained that the orc chief was so moved by her character's request he granted her a quick death in honor of her bravery. The kid didn't cry or anything, she just looked down at her hands and it was at this time we decided to stop for the night.
The DM and the girl's dad argued in the driveway for a bit, but I wasn't there to hear everything, just that the DM excused his actions by saying that it's 'just a game, lighten up you'll probably laugh about it later, if she can't handle losing a character she shouldn't play'. I've avoided talking to the DM myself since then. I've never seen him as a 'That Guy' sort, but also he's never DM'd for our group so I don't know if that was a normal thing for him to do.
What are your experiences with introducing kids to tabletop?