I think that the pre-disposition to rape is a like a virus that some men are infected with- I think this infection owes to men not being conditioned/taught that other people are separate human beings with rights of their own. The family unit in which they were brought up plays a major part.
With the cold virus, the person has to be infected with the virus in order to catch a cold. This is made more likely by going outside with wet hair, not wearing a coat, poor diet etc.
If, however, the person has not got the virus they can go outside with wet hair, not wear a coat and neglect their diet. It won't matter-they won't get a cold because the virus is not in their system!
Likewise, a man infected with the rape virus (pre-disposition to rape) when put in situations that present an opportunity to rape (AND get away with it owing to society's beliefs that a woman in bed with a man is 'asking for it'- NOT my view) will do so. Just like a cold presents itself when the body's immune system is compromised.
If, however, he is conditioned to treat women with respect, you can put him in bed with the most attractive drunk woman in the world and he won't rape. Why? Because just like you can only get a cold by being infected with the cold virus, men only rape when they have the mindset that their desires come before the rights of other people.
A man who is conditioned to respect women will not suddenly rape because of a facebook page, but a man who disrespects women will see it as justifying his already latent pre-disposition to rape.