This doesn't seem that crazy to me? I think Facebook is probably bad for these kids, but obviously that's not going to be facebooks perspective, and of course they are going to want to go after target demographics they don't have.
It's more about it being immoral than it being crazy.
It's crazy because facebook is made of people, and most folks that don't spend time plumbing the depraved depths of US digital companies just don't connect with the fact that these people are all practicing the "ich habe es nicht gewusst" of current day.