This is much easier said than done...
If you go to a place where people have fun and meet other people, such as a party, a bar, or whatever, almost no one will be sober.
It is not uncommon for a woman to expect the man to make a move. Feminism is only good when it's convenient.
Women will have the benefit of the doubt and it's entirelly up to them to decide if it was rape or not.
Are men supposed to be mind readers? Women drink to reduce their own inibitions, but then expect the man to make a move and will later decide they couldn't say no even if they wanted to?
I understand there are extremes where it is clear that the man crossed the line, but that line is very blurry for most situations. Some people already have a hard time hooking up with others and you add all this uncertainty to the bizarre ritual of human coupling... IMO if you want to get irresponsibly drunk in a place people go to find sex partners, and you do not want to be targetted for sex, use a pin saying so.