Facebook is being urged by some members of Congress to change its privacy policies.
Earlier this month, the social networking giant decided to start sharing user's personal information with select third parties like advertisers.
Users are able to opt out by changing their settings.
Lawmakers want that turned around, so personal information is kept private by default.
"The whole tenet of Facebook had been, you controlled your information. You can decide who can be your friend and who won't be, which means I want to share my information on my page with this group but not anybody else," New York Sen. Charles Schumer said. "And to take that away without the permission just cuts against the grain of facebook's way of operating."
Facebook has over 400 million users and is the second most visited website after Google.