I remembered reading about Bullseye having to change the way the distribute their targeted coupons cause it creeped people out.
They are very good at predicting if a person is pregnant based on their purchase history.
They used to send out coupon books/circulars that were exclusively about babies. This freaked many people out cause a lot of times no one besides the mother knew, and hadn't told anyone yet.
So now they mixed it up. One side of the page is baby stuff the other side lawn mowers. So it is less creepy I guess.
I found the Forbes blog post it is titled "How Target Figured Out A Teen Girl Was Pregnant Before Her Father Did."
Suddenly "Person of Interest" doesn't seem so far-fetched!