They basically already do on loose terms. Do this experiment: make a sock Facebook account, communicate dozens of messages with keywords like "fat", "weight",

They basically already do on loose terms. Do this experiment: make a sock Facebook account, communicate dozens of messages with keywords like "fat", "weight", "exercise", "weight loss", include similar keywords in your likes. Then sit back and watch... you'll be targeted with weight loss pills and all that. But here's the kicker though... the weight loss pills they are advertising are almost always bad. They're scam businesses. The pills they're selling will almost certainly adversely affect your health. But they're going to penetrate the psyche of a person who's having weight issues, they know how to advertise their pills to them. People are going to buy those pills. And yes, when the floodgates that are guarding medical information open up, it's going to be a mess. And it's going to have deleterious effects on our society.