Men should be offended when someone claims that women should prevent rape by not wearing certain things or not going certain places or not acting in a certain way.
That line of thinking presumes that you are incapable of control. That you are so base and uncivilized that it takes extraordinary effort for you to walk down the street without raping someone. That you require a certain dress code be maintained, that certain behaviors be employed so that maybe today, just maybe, you won’t rape someone.
It presumes that your natural state is rapist.