Basically, if Apple implements this, it means your phone is no longer your own.
Every iPhone and iPad will come with parental controls activated. The parents, in this case are Apple, and your national government.
If you, yourself, are a parent, you will have the option to activate a second level of parental control for your children so you are notified if they share nude images. In some cultures this will lead to a stern taking to. In others, it will lead to honour killings.