We are a commune of inquiring, skeptical, politically centrist, capitalist, anglophile, traditionalist New England Yankee humans, humanoids, and animals with many interests beyond and above politics. Each of us has had a high-school education (or GED), but all had ADD so didn't pay attention very well, especially the dogs. Each one of us does "try my best to be just like I am," and none of us enjoys working for others, including for Maggie, from whom we receive neither a nickel nor a dime. Freedom from nags, cranks, government, do-gooders, control-freaks and idiots is all that we ask for.
As with lots of other data, if they don't put any identifying features on your data, like your name or SSN they can claim no one can tell it's you. Of course, data mining can narrow down to a very few people out of millions very quickly, even if they don't know you are called "Jim."
It is a very nasty tradeoff. This type of health data can absolutely help make us healthier, but it can also create situations where life insurance companies can figure out that someone very much like you has some worrisome characteristics and not sell to you.
Assistant Village Idiot
Isn't that precisely the problem, AVI? They are attaching names and birthdates to the data set. Thus allowing fully personalized targeting of all the most important market drivers (read: profitability maximized and liability minimized) - for the benefit of client, of course, which isn't you. You're just the meat.