The rise of social media is doing some interesting things to the U.S. legal system. In divorce and child custody cases, lawyers already head straight to the opposition's social media to find posts that will help discredit them. For example, a few photos of a parent partying hard can be a big part of them losing a custody battle.
Now, social media could be changing things in another area: serving papers. As the law currently stands, to file a lawsuit or take other legal action against someone, that person has to be personally handed the papers related to the action. In most states, you can't even drop them off in a mailbox. That's a problem when someone is purposely avoiding being served.
That's why many states let you leave a copy of the papers at the person's house while also mailing a copy. After 10 days, the service is considered complete.
Still, if you don't know the person's address for some reason, are you out of luck? It looks like the legal system is considering another option that uses Facebook.