I'm still firmly of the opinion that Apple does not know how ipads are actually used in many families. There is nothing personal or private on our shared ipads, and it makes no sense to tightly bind each physical device to a single person's appleid. And this doesn't even get into the question of whether a small child should need to remember usernames and passwords and consent to EULAs. The devices should have settings which respect that while some individual's appleid (e.g. mine) is ultimately responsible for the device, that in no way reflects who the typical user of the device is or what they should have access to in the corresponding apple account. A checkbox during setup that says "this is a shared device that should not have access to my personal data" would be perfectly fine.