Give their parents some credit, they know a product not suitable for children when they see it. I've seen some parents still allow children have horror-genre game related merchandise such as FNAF, Bendy and the Ink Machine, Hello Neighbor, and Poppy Playtime. These parents were smart and responsible enough to read the age rating from your merchandise and opted their kids from discovering Skitzo in an early age. It would be better if their parents explained why your toy was for older kids, teens, or even adults, and that they could get it when they're older, but then again the kid who wanted it first was aware it was a "killer bear" and still wanted it, so it was still somewhat a "flag" that shows how exposed he was to "higher" violent content
Edit: being taught about reality from fiction at an early age is actually a pretty important lesson, I'll agree with that.