I guess I wasn't interested enough, because I could not concentrate on anything else but the focus. Stopped it after just a few minutes - driving me absolutely crazy !
I even looked up how auto-focus works to see wether there was any validity to your claims about the images fooling the camera.
There's basically two types, and when the target is a Flat-panel LCD... the camera needs servicing and/or you need to learn how to use the manual focus.
Sorry.