Are you a parent? The way YouTube works - and how centralized video has become - means it's extremely easy to let a kid fall into these dark areas just by playing one innocent video. There is no obvious option to hide the rest of the UI, stop autoplay or recommended videos.
It also is nothing, absolutely nothing like Looney Tunes. Please watch the videos linked by the article before making such a statement. In one of them, Peppa Pig uses a razor blade to slice a piece of her own arm, right after eating her own father.