I noticed an story on Russia Today, featuring a news article on Monsanto suing farmers. It states that Monsanto have won more than $23 million from hundreds of farmers who have been sued for patient infringements due to growing Monsanto genetically modified seeds without paying Monsanto. I will let the article speak for itself.
Looking into this I found three other articles which address this, with two discussing Monsanto suing small farmers and allegations of Monsanto illegally trespassing on private property to investigate patient infringements from organic farms (which was apparently due to accidental cross-pollination from neighboring Monsanto farms). The third link is from Monsanto providing their side of the story.