It's always surprising to me to see tech folks disparage humanities studies, then seem flabbergasted at how to fight problems like disinformation/misinformation. IMO, studying language, literature, and criticism are critical skills for operating in a culture that is flooded with information.
In terms of what we can do right now... I've been following Mike Caulfield on Twitter (@holden) and he is doing some interesting work on developing mental tools that school kids can use to evaluate the information that comes to them in social feeds.
I now think the problem with this is a lack of standards. It is documented that textbook manufacturers publish different history and science texts based on the region of the country regarding the civil war or evolution.
Not to be a nihilist, but what makes you think underfunded schools that struggle to teach basic reading will teach media literacy and criticism with any success? and will be supported by publishers that feel the same way?
I also think critical thinking is VERY hard. Harder than people imagine. It is hard to teach, hard to deploy, hard to practice. I'm not sure even 20% of the population could muster the brain power required to sift through today's onslaught of zone-flooding garbage.
Crash Course (the YouTube channel) published a short series last year on Navigating Digital Information (https://www.youtube.com/playlist?list=PL8dPuuaLjXtN07XYqqWSK...). I really appreciated its pointers for how to deal with social media.
It's easy to get people to question advertising, because they aren't emotionally invested. Once you stray into religion and politics, people often stop caring that they're hearing plainly untrue, or even self-contradictory, ideas.
i have developed a loose curriculum for the latter half of that pipeline, but getting the education uniformly distributed throughout the public mind market is the hard part.