What our parents were told D&D was about: Satanism, blood rituals, animal and occasionally human sacrifice.
What D&D actually is: Cooperative storytelling, stand up comedy, group therapy and first-year applied statistics.
@mhoye The scariest thing about DnD, is that the controversy tells us how the opposed thinks and interacts with the world.
You and I both know I'm not actually Montgomery Gator the copyright character. I'm just playing him at times on the Internet because I think he's an interesting character with unexplored depth that I really vibe with. He became a comfort character that helped me through some depression (sicking an imaginary ego monster on your depression demon is surprisingly effective).
According to their world view, and how their minds apparently work, they could not maintain the separation between perceived objective reality and imagined fiction. They would actually start believing they are Montgomery Gator. They believe a demon from hell, would take the form of Montgomery Gator to inhabit my body (hot...) to worship Satan if I did the thing I'm doing.
Modeling what their internal mental architecture looks like, based on their assumptions they make of others should scare the hell out of everyone.
And learning that D4s are caltrops and they hurt worse than stepping on a lego piece.