The thing about this which makes me think it wouldn't be something Apple would implement is that Apple's priority (after doing what's right for Apple) is what's best for the user over what's best for third parties (most notably the networks when they launched the iPhone, stopping their "value add" customisations) and it's hard to see how using this technology to implement a kill switch benefits the user. Even Apple's…
big concert promoters could point to all the flickr pages with pics of their shows from iphones and threaten to sue apple unless apple implements a means to disable taking pics at a concert. this is very similar to the code that allows DVRs to shut off analogue outputs when playing new release movies (Selectable Output Control) * i don't agree with either of these.
Phones don't record gigs, people do.