Judging by the frenzied claims of lawmakers like US representative Jackie Speier, enabling the Do Not Track feature ranks up there with locking doors and shredding credit card statements.
DNT settings, which ask ad networks and the websites you visit not to track you, are the brainchild of security and privacy rabble-rouser Christopher Soghoian. His idea was to port the functionality of the Do Not Call list to the Internet, without forcing users to figure out cookies or register their computers in a national database. Firefox, IE9, and Safari all offer the option.

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