Of course. I can't imagine how you'd define such a thing objectively. But a fair bit of content is more-or-less unanimously off limits, and it doesn't seem use

Of course. I can't imagine how you'd define such a thing objectively. But a fair bit of content is more-or-less unanimously off limits, and it doesn't seem useful to say "I can't define it rigorously so I guess we have to allow the child torture porn". Communities are best-effort activities.