Lemme put this in a simple way.
Parents are letting their kids who are 7-10 play.These kids, not all, but a good bunch, are spoiled, and beg for everything and usually get it.The other batch have been put down because of their piers.Hackers will be hackers, no matter the age(Admit it, you've used Nodus during hunger games or something).
The good players, they either left after the adventure update, or stayed and just dont use the features implemented.