cyberianpan writes "Imagine a world where advertisers would be able to predict your detailed behavior online. They would know when you are about to buy a song, a car, a present for your spouse — they would know virtually everything you are thinking. With the acquisition of DoubleClick, Google now has access to the cookies and subsequently browsing history of vast numbers of web users. It would be fair to say that greater than 85% of Internet users frequently come into contact with ads served by DoubleClick. Google could potentially have access to not only the majority of the world's search history but its browsing and e-commerce history as well. The company could know more about web surfers than they know about themselves."