That it makes the public less willing to go to war with Russia and its allies? That it makes us less trusting of lying, torturing, coup-staging intelligence agencies? Does accidentally catching a glimpse of that green RT logo turn you to stone like Medusa, or melt your face like in Raiders of the Lost Ark?
"Well, it makes us lose trust in our institutions," is the most common reply.
Okay. So? Where's the threat there? We know for a fact that we've been lied to by those institutions. Iraq isn't just something we imagined. We should be skeptical of claims made by western governments, intelligence agencies and mass media. How specifically is that skepticism dangerous?
Trying to get answers to such questions from rank-and-file empire loyalists is like pulling teeth, and they are equally lacking in the mass media who are constantly sounding the alarm about Russian propaganda. All I see are stories about Russia funding environmentalists (the horror!), giving a voice to civil rights activists (oh noes!), and retweeting articles supportive of Jeremy Corbyn (think of the children!).