Our society is turning into an Information Gathering Orgy. Not only do retailers want to know what you buy and when you buy it but advertising conglomerates are now able to predict which ads you will most likely react to based on information they have been gathering about you and your family on the Internet.
A new analysis of online consumer data shows that large Web companies are learning more about people than ever from what they search for and do on the Internet, gathering clues about the tastes and preferences of a typical user several hundred times a month.
These companies use that information to predict what content and advertisements people most likely want to see. They can charge steep prices for carefully tailored ads because of their high response rates.
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http://www.nytimes.com/2008/03/10/technology/10privacy.html?_r=1&oref=slogin