Gee, and here I thought that part of my role as a citizen is to "fact-check" things on my own before accepting them as true.
Generally, I've found that if you follow a few simple rules, it's not that tough:
1) If it sounds too good or too bad to be true, it probably isn't.
2) If it doesn't seem consistent with common sense, and the way people normally act, it probably isn't.
3) If it is only being reported by sources whose bias it seems to favor, double down on your own fact checking before accepting it as true.
Two recent examples are Sarah Palin going off on "Obama awarding himself a medal" and some on the left going off on Trump firing all the political Ambassadors on day one. A little bit of fact checking confirmed that the same medal had been awarded by prior outgoing SecDef's to Clinton and Bush, and that Obama also had fired political ambassadors from day one. but because the narrative fit some folks biases, they ran with "Look at what he's did!" stories before getting the facts.
It's on us, not professional "fact checkers".