I was mildly obsessive about fact checking. And oh wow, it is bad.
My takeaway was that people who casually read the news (e.g. newspaper, scanning headlines on their favorite news site, etc) are the most misinformed.[1] The one who doesn't follow the news knows he is ignorant and doesn't know the inaccurate information. The one who follows it heavily, and with an eye towards gaining knowledge (and not following a tribe) will develop the skill to sift through the crap.
[1] Well, OK - those who obsessively follow only the news in their bubble are probably worse.