William Wyler's "Wild Boys of the Road" (
http://us.imdb.com/title/tt0024772/ ) is one of the best, and earliest, films of this genre. The whole film is basically a call to ancarchy, which is hysterical because the film was made just before the Haye's Code, so this type of stuff was pretty much missing in the films throughout the entire decade following. At the end of the film FDR comes out and makes it all better, very very enjoyable.