They should teach critical analysis/critical thinking in schools (oh that's right, they do)
Just basic stuff like getting multiple sources, gauging the validity/coherence of the sources, analysing perspectives, understanding biases etc.
That isn't a dig at anyone on here btw. People tend to be able to filter through the bullshit. More the twitterati side of things. A lot of people get swept along by the most flimsy, bullshit rumour and don't seem to be able to separate out something that has clear credibility from something made up by a tabloid hack, sat in an office somewhere in London or Manchester.
Not to get too heavy, but it's a huge issue in society generally in the 'fake news', 'post-truth' era. We need to educate our kids to think critically because they are going to need those skills more than ever.