> The system relies on signals such as the types of videos a user searches for and watches, and how long their account has been active, to determine whether they are under the age of 18.

I'm sure the reporting doesn't have all the detail, but if this is the extent of the detection heuristics, it seems to me that anybody who signs up anew would be forced to prove their age. If a new account gets created and the person immediately searches for "adult" content, there's no way to reliably guess the person's age, is there?

I might get downvoted for this but I immediately think of adults who consume certain content having a rough time:

Bronies, The last airbender, Anime in general, Superhero stuff