Who cares? The simplest fact-checking can prove any news story as plausible or bullshit. It's Journalism 101. The thing that first year J-school students do as an internship for the New York Times, or whoever the Newspaper happens to be in their town.
Right. Because Angela Merkel will be involved in some practical way in tagging fake news sites. Seriously, man. You can do better than that. Fact-checking is a well-defined and understood skill set that is simply being applied to new medium that desperately needs it. This isn't hard, technologically, logically, ideologically, manpower-wise, or in any other way. (Shit, let's just flip the problem around and create a Verified tag, like Verisign did. That's a 20-year old solution that still works today.)