Even Apple's more questionable moves are, based on Apple's view of the world, based on improving the lot of the end user. You can talk about how not being open doesn't benefit the user but Apple clearly disagree - they're not walling off their phone because they're fascists, they're doing so because they believe that provides a better experience overall. You can disagree with that but I see no rational argument even if they do you disagree with their approach which takes you from the walled garden to this sort of kill switch.
Plus to implement such a thing would put them at a significant commercial disadvantage against Android and other smart phone platforms at precisely the time when their advantage is shrinking (if not gone altogether). Certainly if they implemented this then my current iPhone would absolutely be my last.
But just because something is technically possible it doesn't mean it will happen and this would seem to be one of those cases.
Unless someone can come up with a realistic scenario where Apple benefit from this? And please no shadowy conspiracies - if that were the case Apple wouldn't have publicly patented it and it wouldn't just be Apple, after all, the Man doesn't just care about Apple customers...