[Applejinx]

I think the insurance company would care a whole lot!

Facebook's big data is getting to where they can predict things like pregnancies, illnesses based on parsing minor changes in behavior and correlating it against the big data set. This is of course super interesting, but it also gives you results like 'suddenly this guy is 42% more likely to die in the next 6 months and doesn't know it'. There are no certainties, but to an actuarial entity like an insurance company?

That's more than worth getting your lobbyists to repeal any shred of requirement that you have to keep faith with such a person. Insurance combined with big data and stripped regulations makes such an industry purely a financial play: handled properly they can, for a time, collect money and never pay any of it out, until it becomes obvious that's what they're doing.

Those are the entities most interested in having Facebook tell them you're probably getting sick. And why would Facebook ever tell you? That's their inference. You never said a thing about it, and indeed they could be wrong. But don't bet on it.