So if I have a perchant for salty, tasty fried snackfoods, Big Brother will know? Creepy!
What if Big Brother is your insurance company who decides to raise your premiums based on eating habits?
The info about your eating habits now becomes a commodity that the store can sell to other businesses or to firms who will crunch the data. Fer instance, it's a little creepy when a woman receives a direct mail ad or free sample for a new feminine hygiene product right around that time of the month...
I assume you're just being sarcastic, in an ironic sort of way. I'm sure you're bright enough to grasp the concept behind Able Danger, for example, which led to Atta via open source info like......the food he ate.
Of course, if you really just don't get the concept, reread the thread slowly.