That's crazy. Facebook should absolutely take the government to court over this. They're probably doing this because Google and Facebook have already agreed to a lot of things which may have seemed "reasonable" but this is really taking it too far. It's not Facebook's responsibility to verify the truthfulness of all the posts on its site.

On the other hand, perhaps this forces Facebook to give up on being a "news platform", too, and not just a social network, which wouldn't be a terrible thing to happen.