Also, below is a recent article about professional Iranian trolls, but mentions that the same cybersecurity company has been tracking Russian disinformation campaigns for years. There are thousands of people in Russia, in Iran, in other countries who go into the office every day and earn their paycheck by trying to move opinion in the USA and elsewhere in a certain direction, or spread FUD.
https://www.nytimes.com/2018/08/23/technology/fireeye-facebo...
> FireEye’s information operations analysis team was formed in 2016, when hacked emails from several political figures were beginning to appear on the site DCLeaks. “All through that period, we were tracking the Russian effort to influence U.S. elections,” Mr. Foster said. “Obviously, social media is a very important kind of medium by which these campaigns are undertaken.”