That's a good question. In theory I'd like to suggest they think. That is, develop critical thinking skills and some basic analysis skills. Yes, it's a big ask. But it would be useful across the board. Basics such as: confirmation bias, correlation vs cause, conflict of interest, and such. These skills are not as common as they should be.
That aside, broadcasters and publishers should be required to label news as news and editorial as editorial. Anecdotally, many people don't understand the difference, or why it matters. It's difficult to have discussions when "the facts" most people cite are based on editorial opinion. Sadly, hammer that option often enough and loud enough and it becomes "true."
Even so, it's a massive problem. There's still too much wiggle room for senders to "baffle them with bullshit." (See below.)
Editorial: My definition of news is: facts that are not only true but are also relevant and important. Anything - true or not - that doesn't meet this standard - again, to me - is fake news. In other words, when important and relevant stories are buried with trite fodder, the fodder is fake news. Just because something happened, just because some is true doesn't make it news. The sun coming up again is not news.