I've been involved in sexual harassment cases three times in different decades and each time it stumped us all on how to handle it.
It typically goes like this: women get approached in ways that make them uncomfortable but offers plausible deniability to the men involved. The women want to report it but fear it will hurt their careers. They feel they can't go to HR because HR is on the side of the men who run the company because they have their own careers to consider.
So sometimes the women confide in someone like me about what to do. I don't know what to do because they insist on confidentiality, and for good reason — for preservation of their careers. I know the men involved but can't say a thing and the men behave like perfect gentleman in front of me or HR or anyone else, perhaps to cover their tendencies, I don't know. I encourage the women to go to HR for the sake of the other women, but they are too afraid.
The women do a whisper campaign among the other women as a collective effort to defend them. Some of the other women get mad at the company, as they should. They encourage the women who felt harassed to go to HR. They won't.
In the cases I've been involved in, the women who felt harassed and confided in other women felt they might get outed and fear it will hurt their careers. So they leave and don't tell the real reason why they left.
The women who remain and know the situation get angry because of the unfairness of it all. They may give their heard-from-someone account to HR and the company is left to try and unravel it all. The accused men act incensed and say this is why they cannot take a female coworker to lunch like they can a male. Most of the women who felt harassed are never willing to speak and they won't let someone like me say anything either. I don't blame them, I'm just describing the situation.
They often say "See what happened to Anita Hill? How about the women who accused Trump, an admitted sexual predator? How about the Kavanaugh hearings? No one in the highest levels of the law seem to know what to do."
Does the company let these accused men go? Will those men sue the company for ruining their careers without enough evidence? Or do you give them the benefit of the doubt and let them be President and Supreme Court Justice while wrecking the lives of the women who were willing to say something?