Facebook, MySpace caught releasing user data

Facebook isn't alone this time: rival social-media site MySpace has also been called out in Friday's Wall Street Journal report by Emily Steel and Jessica E. Vascellaro — together with the content-sharing sites Livejournal and Digg.

The report says that the companies have delivered user data to major online advertising companies such as Google's DoubleClick and Yahoo!'s Right Media, despite explicit pledges to protect such information. The released material includes user names and ID numbers, together with data that could be used to accumulate a host of additional information on individual users, such as where they live, their names, occupations, incomes and places of employment.

As Steel and Vascellaro write:

"Across the Web, it's common for advertisers to receive the address of the page from which a user clicked on an ad. Usually, they receive nothing more about the user than an unintelligible string of letters and numbers that can't be traced back to an individual. With social networking sites, however, those addresses typically include user names that could direct advertisers back to a profile page full of personal information. In some cases, user names are people's real names."

Representatives of both DoubleClick and Right Media told the Journal reporters that they were unaware they were receiving such data — and stressed that they hadn't tried to make use of any of it.