While lawmakers weigh regulatory action against Facebook, the company's Oversight Board could have a more immediate impact on the social network. Facebook has promised to honor the board's rulings over the company, and it's possible that Haugen's testimony could compel the Oversight Board to recommend Facebook change some practices it hasn't wanted to alter, such as changes to its algorithmic News Feed or long-brewing plans to launch a social network for kids. (Facebook declined to comment for this story.)