Was thinking that too, although there are some caveats, you need to at least log into the store to download apps as it stands right now. I think you can log out after installing them, but still. Also using FaceTime or iMessage require accounts, when Apple otherwise could have it set up to just register with the phone number only, have no account, and just be ephemeral to that specific device. (But then at that point, they might as well just follow the IMS video call standard that is cross-platform and do away with FaceTime altogether, and the mobile industry should figure out the SMS replacement to then eliminate iMessage.)