Right, it seems to me, about the heuristic difficulty for most people. But you can't show them what other people know about them, because other people keep that information secret from those who don't pay for it, and they sell it in bulk in all the markets where the transactions are visible at all. Technical and legal obstacles lie in the way of making the argument in the form you think would be most effective; your analysis of those difficulties, and suggestions about how to surmount them, would be very useful.