You likely already know about the highly publicized manipulation of LIBOR. But did you know about the much-less published manipulation of milk prices?
You do now.
It was (allegedly) accomplished basically the same way: By inputting fake ("erroneous") data into the reporting scheme. With milk, this allegedly resulted in manipulation of the minimum prices set by the government.
Judge Wu's excellent opinion has all the details. As well as a pretty persuasive result.
Everything you want to know about milk and more.