Not very often at all. We know the difference. We know, or learn quite quickly, as do the vast majority of men, how to politely say no, to those who wish to be polite.

Stop assuming this is hysteria, it's not. It's a collective, we're just tired of this. And let me also offer some quick and dirty math to support that it's not a majority of men. Let's assume 1% of men don't know how to be polite and in fact enjoy being abusive. They do this on average 1/week to a randomly chosen woman. Within a relatively short time every woman will have had at least one unpleasant experience.

For the most part these individuals pick on people they presume to be easy targets, so some women get treated much worse than others, just as men who are perceived to be easy targets equally have problems - probably with the same guys. That's also why the power dynamics play into it, the definition of easy target depends on that. And at some point, everybody just gives up, deals with their situation as best they can, and tries to never go upstairs ever again in Yale frat houses.