My favourite is the story that there was mass panic over a radio broadcast of War of the Worlds where everyone thought a real alien invasion was happening. I heard this story as a kid and really thought this was a cruel prank played by the radio station.
In reality, they made it clear at the beginning of the broadcast, and twice during, that it was fictional. Not that many people were listening and most of the people who were, were aware it wasn’t real. A few idiots freaked out and it somehow turned into a story of mass panic. It was propaganda by newspapers to discredit radio.
The Boston Massacre.
9 officers were surrounded by like 300 angry Bostonians who were wielding clubs and other weapons and goading them to fire their weapons while throwing shit at them. The fact that the only punishment for the officers who killed five people following their trial (in colonial court defended by John Adams) was that two had their thumbs branded indicated how two-sided the situation was.
Paul Revere’s famous engraving depicting the incident was intentional anti-British propaganda used to advance the cause of the revolution.