Getty; Rebecca Zisser/BIHulu content started appearing on the Disney+ app this summer for some Disney+ subscribers.Some parents are mad that kids can now see true-crime series, YouTube shows, and other non-Disney content.Disney+ lacks some of the parental controls that Netflix offers for kids' accounts.For most people, having Hulu movies and shows appear on the Disney+ app is a boon: It means more variety and not having to switch between two apps.But it hasn't been a welcome change for some parents.