We noticed the number of films, particularly in porn, in which women were forcibly stripped at gunpoint or knifepoint and raped. They were eventually, as they say, screwed into submission, threw their arms around their attacker and thanked him for this glorious liberating experience. Plainly, the message in these films was that when a woman says no she really means yes. The BBFC decided that the material was depraving and corrupting. It was not a message about rape that ought to be propagated.
Serious films make their own rules.
I don't think you can have rules about serious films, but you can have rules about a genre like pornography . Ferman pioneered the cinematic release of Ai No Corrida a few years ago and stresses the distinction between quality films and those which are apprehended rather than comprehended. Pornography is a generalising medium, it doesn't exactly promote intellectual messages. Anyone who has taken a media studies course during the eighties will probably know about the male gaze. For feminist film theorists, it was fundamental to the way Hollywood misrepresented women.