A solution doesn't have to be perfect to be effective for the majority. Many parents do make sure to get to know the parents of their kids' friends, and the ho

A solution doesn't have to be perfect to be effective for the majority. Many parents do make sure to get to know the parents of their kids' friends, and the household rules. If kids are showing each other explicit stuff in school there are usually policies and even laws to address that. All that said, Apple markets their solutions as things that "just work". So it's fair to criticize them for gaps that can be reasonably addressed, especially when they have such a huge war chest.