You must ask yourself honestly : Why is it, when faced with stories like this, is your first instinct to claim that the woman lied or made it up?
Come on, we all know why it is. Just fucking tell them. Tell them that it's their first instinct because they don't want to believe that they could be part of the problem, however slightly. Tell them that they don't want to believe that people they know and call friends are actually acting like complete shitbags. Tell them that you know that they've been hurt, that they feel worthless and useless and powerless, and that you know they feel more powerful and thus more worthy and useful when they make someone else feel even worse about themselves.
And then tell them that the only way that they're ever going to feel better is by helping to create a world where we don't just shit all over one another. Because you've got to tie it into their self-interest.
Naturally, most of them won't listen right away. But perhaps eventually, after continuing to try making the world shittier as a way of making it a nicer place to live, they will start watching where they shit.