I figure either (A) they're trying to carve out a niche of hardcore consumers who do care, or (B) they're trying to play a long game, hoping that broad sentiment shifts towards valuing electronic privacy. If it's the former case, I think they're doing fine; these kinds of whitepapers will reach most of those who care, and periodic news articles ("Terrorist iPhone unable to be unlocked!") will reach the rest.
If it's the latter, I think it's a pretty big risk given the scale of their re-education task (the pool of users willing to sacrifice personal privacy for other benefits, i.e. Google and Facebook's bread and butter) and the potential pushback they'll receive/have been receiving from governmental sources.
What does HN think? Is this a viable business differentiator for them, long term? Or will they have to shift to the 'dark side' of personalized data and services to remain competitive in the future?