Companies have been monitoring our online behavior for almost as long as there's been an Internet, often using our online footsteps (cookies) whenever we search, browse or buy online. Tracking technology has advanced so much that everything from how long we linger over a product description to whether we are searching for sexual-dysfunction drugs can be collected and stored on individual profiles. Our profiles are numeric descriptions, not our real names, but in some cases, it's not hard to determine personal information behind the numbers.
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