Lawmakers demand answers on user data from Facebook

Four lawmakers wrote to Facebook CEO Mark Zuckerberg on Friday, questioning him about the social network's handling of user data.

In the letter, Reps. Joe Barton (R-Texas), Edward MarkeyEdward (Ed) John MarkeyRegulators seek to remove barriers to electric grid storage Markey, Paul want to know if new rules are helping opioid treatment Oil spill tax on oil companies reinstated as part of budget deal MORE (D-Mass.), Marsha BlackburnMarsha BlackburnBlackburn pushes back on potential Corker bid: 'I'm going to win' Nervous GOP seeks new 2018 Senate candidates in three states Corker 'listening closely' to calls to reconsider retirement MORE (R-Tenn.) and Carolyn Maloney (D-N.Y.) pointed to reports about an Austrian consumer who had asked Facebook to provide him with the data it had collected about him.

Facebook sent the man a CD with 1,200 pages of data, including his chat conversations, everyone he had ever "poked," events he had been invited to (regardless of whether he attended) and even the IP addresses of the computers he used to log into his account.  

The data included information that the consumer thought he had deleted, such as personal messages and people he had "defriended."

"We are concerned that although the user was under the impression that this information was deleted at the user's request, Facebook continued to retain the information," the lawmakers wrote.

They asked Zuckerberg to describe "all personally identifiable information that Facebook collects," how it stores user information and whether it deletes information when a user requests it. They also asked how Facebook balances user privacy with free-speech rights.

"We care deeply about respecting the expectations of the people who trust Facebook with their information and believe that our sound data policies and secure practices are part of the reason people enjoy using our service," a Facebook spokesman said. "We look forward to discussing this in more detail with members of the Bipartisan Privacy Caucus and answering any questions they may have."

The lawmakers, who are all members of the Congressional Bipartisan Privacy Caucus, requested a response to their questions by Nov. 21.

—This post was updated at 3:01 p.m.