let's do what an intelligence analyst should do (that is, analyze and not just do whatever his client pays him to do). And, the first step before collecting current information is to understand the history. In our case, the history of "Fake News" in USA at least, goes back to the days of WW1 (that's World War 1) and became mainstream, during WW2. Fake News as they are calling it, has since then been part of an information arsenal in any ground based propaganda campaign, even before the days of Edward Bernays. Taking the most basic first step, let's look at Wikipedia under the entry "Propaganda":
The first large-scale use of propaganda by the U.S. government came during World War I. The government enlisted the help of citizens and children to help promote war bonds and stamps to help stimulate the economy. To keep the prices of war supplies down (guns, gunpowder, cannons, steel, etc.), the U.S. government produced posters that encouraged people to reduce waste and grow their own vegetables in "victory gardens". The public skepticism that was generated by the heavy-handed tactics of the Committee on Public Information would lead the postwar government to officially abandon the use of propaganda.