Completely agree with your diagnosis. As for the prognosis, social policy may be a good idea, but it is not what HackerNews readers are best positioned to facilitate. Rather, we should be implementing technologies to faciltate the increase of entropy in information actually and unavoidably collected. Plausible deniability will be the best safety net against future risks unknown.

If my dildo is publicly known to have reported its use whilst I was also known to have been watching Trump's Presidential Address (don't ask!), I would have an out in that all such data has long been known to have been poisoned. Spam is our friend.