Just like forcing Facebook and Twitter to give you a social media account OR ELSE. Hell, Congressman Devin Nunes has filed a lawsuit over it and b/c two satire accounts hurt his feels.
Social media is a new concept that may need to be regulated. If most people get their info from social media, being able to control who gets to post is being able to control civil discussion.
And not just control it, deny it to people deemed unworthy.
I can see the concept of a digital commons being applied to sites like facebook and twitter, unless they take responsibility for everything posted on their sites as their content, and can thus be liable for it.