This would be a terrible precedent. These are private companies, who is the government to tell them how to operate without funding them. If you don't like what you read, or if you read things that are not true that is on you as an individual to make appropriate choices. The government shouldnt meddle with social networks. They are just that, social and voluntary.
You are kidding right? You don't think the government already controls almost everything about how companies can operate?