> Make people less fat by moving where the produce is in the store

It doesn't? Not even a little bit ? Genuine question. One of the example of data exploitation I was given in university is that retail companies look for patterns in the thing their customers buy, and when they see that people who buy X-kind of thing also tend to buy Y-kind of thing, they tend to put X and Y right next to each other to push the customers to buy X and Y. Wouldn't doing the opposite work ?