The regular categorization should be left to the publishers, but it should be much wider and multilevel, not the current choice of, what, 10 categories?
Yes, other things like hate speech are harder to detect, but, as I said, it's extremely subjective, and should not be dealt with in a general way, but rather broken down into subcategories, like "religion criticism", "radical feminism", "men's rights", etc, whatever ruffles people's feathers these days.