I doubt they were talking about any kind of "adult" content. The situation they're referring to is more like "your second grader should be focused on multiplication, not long division."
Never underestimate how upset people can get when a kid does longhand addition the old way (write numbers under each other, carry the ones) rather than some more "holistic" way.
I'm not sure why the commenter is being downvoted. I too can make a drama, literally capitalizing one of the worst words ever invented, "actually," about a vague antagonist, and rile people up, letting their imaginations fill in whatever boogieman they feel wronged them in school. What specifically is the situation? I don't want to speculate.