Looking for a story
Years ago I read a story about a man who threw a rock through a window of the local politician's office. Then it happened elsewhere, and next thing he knew it was happening all over.
Does anyone know the story I read? What was the title and who was the author? It was at least 20 years ago I read it, in a collection of short stories.
The intelligence of that creature known as a crowd is the square root of the number of people in it.”
--- Terry Pratchett
"There are some people that if they don't know, you can't tell them."