[zdragnar]

What is "age appropriate" changes by the year, and is not universally agreed upon by everyone. I'm not sure that is a problem that will ever actually be solved.

As for categorizing content in general, I think it's pretty safe to look at Facebook and Twitter for examples of content moderation failing in spectacular ways, just as it is by all of the horror stories of Google accounts being automatically locked for utterly unclear reasons because some automated system picked up some cue and erroneously banned the account.