You can’t expect Apple to do an investigation of every phone they wipe at a customer’s request. What about Google Docs? Even if the user clicks the “delete” button, Google performs the physical act of deletion. So should clicking that button trigger a pop-up with the message, “Deletion will occur once we’ve verified that you are not under investigation by the authorities in your jurisdiction”? Or should it silently send the “deleted” document to an archive that Google must maintain indefinitely for the purpose of responding to subpoenas?