"Folks is their own cops."
…Casy’s eyes shone with excitement. He turned to the other men. "Ya see?" he cried. "I tol’ you. Cops cause more trouble than they stop."
– John Steinbeck
The Grapes of Wrath, Chapter 26. Tom Joad explains that in the government migrant camp, instead of people being kept in order by police offices, the migrants act as a community and police themselves. Jim Casy reacts excitedly, offering the ironic comment that California police cause more trouble than they prevent.