An anonymous reader writes "Two U.S. congressmen have accused Facebook of evading questions about whether it tracks users in order to deliver targeted ads. Joe Barton, a Texas Republican, and Edward Markey, a Massachusetts Democrat, said the social networking giant failed to adequately answer questions raised by a patent application that suggests Facebook could be tracking users on other websites. The duo previously asked the Federal Trade Commission to investigate accusations that Facebook tracks its users even after they log out of the social network, an issue the company says it has since fixed."
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