Psycho, Bonnie and Clyde, and The Virgin Spring are among the most violent movies made during the long-defunct Hays Code of censorship.

In the 1980s, parents in the US were angry about the ratings system, and it would take one of Hollywood's most famous directors to appease them.

Nonetheless, with respect to the anonymous men and women who make up the MPAA’s film ratings board (seriously: Who were the ratings voters who thought Beetlejuice was cool for eight-year-olds?) ...

For the 1269 films we analyzed, we found that the MPAA assigned between 0 (for G-rated films) and 6 rating reasons for any single film. The number of reasons indicated for the MPAA rating ...