Order an ACLU Pizza for that Total Information Awareness experience (turn on your speakers).

Related:
a) Tim O'Reilly's data collection experience:

Heck, just recently, I was shopping in Bath, England, and made a large purchase in an antiquarian bookshop. Fifteen minutes later, I was four buildings down the street in a second bookshop, tried to make another purchase, and had my card rejected. Meanwhile, back in California, my wife was receiving a call, wondering if the card had been stolen. "Why would someone halfway around the world be spending so much on books?" they wanted to know.