On the iPod Nano (2G), Apple has a Vulcan Nerve Pinch (holding down the menu button and the select button), which I was forced to use quite often when I first got it (the new software releases seem better). Presumably, they engineered something similar into the iPhone. That won't solve any conspiracy theory issues, but it should at least keep the thing running.

(BTW, Steve Bellovin and others wrote a great report about the difficulty of supporting wiretapping in VoIP networks. There's also some discussion of cell phone tracking. Fun read.)