What I was advocating for here is that people who are not directly wronged step up and help out. If a man behaves inappropriately towards me and I say something, it is (quite reasonably) often mistaken as a threat. I've never been a man so I don't know for sure, but I suspect that if a male colleague stepped up, took the person aside and said something privately, that this might go a lot better.
I want to shift the focus away from the person who did something wrong and towards minimizing and fixing harm. Too often we focus on the person who did a bad thing. Unless there is reason to believe that the person hurting people is dangerous or unable to stop hurting people, I'd much rather focus on "what are we going to do to fix this situation" than "what do we do with the person who caused this?"