Another reason not to rely on a corporate website for your news and information.
So you don't read any non-tax funded news-sites then, you know the ones ran by news corporations?
But honestly, it's facebook's decision to decide whether or not they want their platfrom to be used in distribution of non-factual/made up 'news'. I personally do not get my news from FB but I've seen the amount of entirely made up 'news' from blogs that have been shared in the recent years. A simple thing that I've seen repeated time and time again here is this: someone files a report about an immigrant committing some crime, usually theft or assault. The yellow-press then runs this with a headline along the lines of 'Immigrant man under investigation for crime X'. Then some nationalist blog made up to look like a news site runs an article with the headline "yet another immigrant crime, man from *insert country* harassed a teenager.", then, to appear more credible they link to the previous article about an ongoing investigation.
These spread like wildfire on social media because the headlines are usually shocking and they pander the the preconceived notions and fears that people have, and nobody bothers to check what the source actually says. If you point out in the comment section that the guy has not in fact been convicted of anything and it's an ongoing investigation (you know, innocent until proven guilty and all that) you get attacked for being 'on their side' or 'defending criminals', nevermind that no crime has of yet been proven to take place. If the guy is convicted it's trumpeted again as evidence of how all brown people are dangerous criminals and/or terrorists. If charges are not raised at all or he's found to be innocent, no correcting stories are run.
There are several sites operating mainly using this principle, many of them receiving funding or support from Russia, which is taking advantage of the immigrant crisis here in Europe to stir up xenophobia and nationalism because a divided and weakened EU is to their benefit. RT is a common 'source' used by these sites, Many of them also cross-link to each other, so that a blog being run in sweden is used as source by blog here in Finland. The traditional media obviously does not report on unsubstantiated rumors which is then further used as 'evidence' that the media is involved in some sort of massive 'cover-up' by not immediately reporting everything someone decided to blog about,
This is what 'alternative facts' mean, and personally having seen how fast these things can spread even after officials come out and issue corrections, I don't mind social media trying to do something about these sites' visibility, because without the massive speed/inertia that they gain by quick shares and likes they'd be in near obscurity. They are only damaging public discourse, because it's now impossible to even try and have a rational discussion with many of these people as they will not accept any news or reporting from the 'corrupted mainstream media' as evidence that they've in fact been duped by propagandists and ideologues. As a test, reporter from a newspaper submitted a story about being attacked by a foreigner(s) last summer and it was immediately published even though no source or evidence was presented. They'll pretty much run everything that serves their agenda, because that's what propaganda is.
I see no reason why facebook should allow this to keep happening. They already censor stuff like nudity and gore out, and I don't see nudity and gore anywhere near as dangerous to the society as made up 'news'.