The picture was just like many of the other Facebook posts criticizing Britain’s decision to leave the European Union: a fake commemorative stamp showing a person preparing to shoot himself in the foot.
But on Tuesday, Facebook revealed that the unremarkable post was anything but. It originated from an Iranian-backed group aimed at Britain, in what the company said was the first known instance of a foreign influence campaign aimed at people outside the United States.
https://www.nytimes.com/2018/08/22/business/facebook-russia-iran-britain.html