I heard about what Facebook was doing and immediate red flags went up. People can use a source regularly but that has nothing to do with whether or not it's trustworthy. Alex Jones has a big audience for example but that doesn't make his stuff trustworthy. So the question becomes if people use and recognize plenty of untrustworthy sites would this still reduce the number of fake news problems? Maybe but the bigger unintended problem may result if people get an increased sense of assurance that these are trusted sources when in fact it may be terrible. I think teaching people that there are plenty of untrustworthy sites out there and especially teaching them how to evaluate information would be an important step in the right direction. Thanks in large part to Trump and people like Alex Jones, people are questioning generally reliable news sources and turning instead to terrible sources. As you've suggested, people trust sites or articles that promote views that are consistent with their beliefs. Get people to understand that a news source that leans towards one political party or another isn't necessarily fake news but just looks at things from a different perspective. I see no easy solutions to this problem.
The future is likely to see businesses develop that vet news and social media articles and put their stamp of approval on them. If people trust the vetting company or pass on the work to someone else who is 'reliable' (at least to them) then we can get some measure of reliability confidence. We could get a rating score between vetting companies. Let's say for example CNN, MSN, Fox News, NBC all said a news source was reliable then we could trust it with a high level of confidence. Let's say Fox said it was fact and none of the other sources said it was, then we could say there's a reasonable chance it's true but has a right wing lean to it. If Breitbart said it's true but Fox didn't then what? Our whole belief system is so tied up with truth that it's hard to even define truth at times. I think this needs to be downloaded to companies that check accuracy for us. Sort of like good old fashioned journalism. How can this be done on the cheap though? Seems getting people to give their own opinion is cheap but...will always be problematic. How do you deal with people who have a political leaning who say stuff is fake just because they don't like how it reflects on what they believe in even if they think the news is likely to be true? Hilary Clinton ran a child abuse ring? What keeps you from simply using your vote to influence opinion? Sorry I have no good answers to this very challenging problem.