Because we already know from long experience that most people don't have the patience or capability to answer security questions. The reality is that an unscru

Because we already know from long experience that most people don't have the patience or capability to answer security questions. The reality is that an unscrupulous repair shop will just answer yes to the prompt (or tell the user to answer yes). People clicked "install" when prompted by IE to install an unrestricted ActiveX control because a banner ad wanted them to "punch the monkey". Do you really think they're going to think about the security of a touch sensor? Now take it one step further and imagine a government spy agency wants to intercept phones and replace parts. (In fact I'm sure it is already happening).