I read this in the July 2017 study version of the Watchtower.
PROPAGANDA—HOW DANGEROUS IS IT?
What is propaganda? In this context, it is the use of biased or misleading information to manipulate the way people think and act. Some equate propaganda with “lies, distortion, deceit, manipulation, mind control, [and] psychological warfare” and associate it with “unethical, harmful, and unfair tactics.”—Propaganda and Persuasion.
How dangerous is propaganda? It is insidious—like an invisible, odorless, poisonous gas—and it seeps into our consciousness. Because we may not see propaganda for what it is, behavior specialist Vance Packard observed: “Many of us are being influenced and manipulated—far more than we realize.” Under its influence, says one scholar, men and women have been “quite easily led into the most preposterously dangerous behaviour”—such as ‘genocide, war, racist hysteria, religious intolerance and many other forms of irrational behaviour.’—Easily Led—A History of Propaganda."
Of course the JWs know what Propaganda is, they are subject to all these things in their teachings, no wonder the GB are worried about them receiving it from somewhere else as they have already shown themselves to be susceptible!!!!!! >:-(