I'm always interested in what the research says. This article from Live Science explains it very well.

https://www.livescience.com/24710-standing-up-sexual-harassment.html

Now, new research finds that this victim-blaming stems from the human tendency to overestimate oneself. The more people assume they'll stand up to a harasser, the more they judge women who don't, a new study finds. The catch? Most evidence suggests people don't confront their harassers, even if they believe they would. (I realize that you actually did, but most people are just imagining that they would).

"They really falsely condemn them," said study researcher Ann Tenbrunsel, a professor of business ethics at the University of Notre Dame. "The basis of their condemnation is that they themselves would have done something differently, and chances are good they would not have."

Previous studies have found that people assume they'll stand up for themselves more in a confrontation scenario than they really will, a psychological tendency called behavioral forecasting bias.

The conclusion does say that practicing for the possibility that this might happen can be beneficial, as well as understanding that just believing that you will spontaneously stand up for yourself without evaluating the situation is unlikely.

"Next, you have to plan and prepare, rehearsing what you want to do just as you would practice fire drills in case of a real emergency. 'You first have to understand it and you have to understand the consequences,' Diekmann said. 'Then you can plan and prepare for it.'"

Here's another good data-based story

https://www.apa.org/monitor/2018/02/sexual-harassment

"One worrying trend is the increase in companies buying liability insurance to defend against sexual harassment lawsuits, because companies may treat sexual harassment as a cost of doing business rather than addressing it, Wilson says. "The fact is it's going to cost the company more to do the training and compliance than buying insurance. That's a hard reality," he says."

Targets who face retaliation usually aren't fired outright, but their lives in the workplace are made so difficult that they eventually quit, says Wilson, a former president of the Arizona Psychological Association. He had one client whose desk was moved into a hallway outside her office and who had her computer and phone taken away after she filed a sexual harassment complaint.

That retaliation doesn't go unnoticed, and fellow workers often distance themselves from the target rather than helping. "Rarely do people stand up for them," Wilson says. "They don't want to get caught in that web or suffer retaliation themselves.

"Bystander intervention training can help reverse that trend by training employees to be responsible for maintaining a safe office environment, even if it means getting involved in a situation they would rather avoid, Wilson says.

While high-profile men in politics, entertainment and the media are dominating the news coverage over allegations of sexual harassment, industries with large numbers of female low-wage workers have much higher rates of sexual harassment that go unnoticed with little public outcry. From 2005 to 2015, more than 41,000 charges of sexual harassment were filed with the EEOC, with the hotel and food industries recording the most charges (14 percent), followed closely by the retail industry (13 percent). The media and entertainment industries each accounted for less than 3 percent of sexual harassment complaints.

Shifts in cultural attitudes toward sexual harassment may ultimately be the most valuable tool in combating sexual harassment by creating a shared sense of public responsibility and accountability."

(Which is the perspective that I'm coming from - working primarily to shift cultural attititudes while still encouraging women to stand up for themselves when possible).