Zuckeberg is the most anti government guy I've ever seen. So it's highly unlikely he's going to allow the government to use the site. The problem is that people tend to feel they need to share everything on there. There are certain people I can tell when their going to the bathroom.
Also, the only drama that gets on there is only if you let it.
Btw, Facebook has now become the social media for adults. Kids and teens are now using twitter, instagram, and snapchat.