Who wants cookies? That's the question being asked by some lawmakers troubled by how internet marketers can track the movements of, and learn about, people who cruise the world wide web.

According to a federal law that goes into effect April 21, web site operators must get parents' permission to collect personal information from children online. But there are no laws governing the use of "cookies," or virtual tags that can pinpoint which sites an internet user has visited.

Many commercial web sites attach cookies to a person's computer that identify the user when he or she...

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