There is an app for that.
iReplicate is that App.
It is an app that replicates screens. I can be used to fool that your device is being shutdown or an error. I can unwanted prevent people from using you device.
Feature:
*3 different types of screens (two custom replicated screen, shutdown screen and blank screen).
*New screens will be added through updates
*Custom Screens can be made to replicate the home screen
*Blank Screen to view that device is not functioning properly.
*Easy exit from any screen.
Check it out now.
App Store - iReplicate