I suspect rape is as prevalent today as it was 40 years ago. The percentage of men who are willing to rape probably hasn't changed much over the years. The difference is today women are more willing to report it. I do, however, sympathize with men who have something come up out of the blue 40 years later with no way to really defend against it. And men have been placed in a very vulnerable position where accusations can be totally fabricated against them. They get tried in the court of public opinion with no real chance to get a fair hearing.
Not exactly sexual harassment, but a related story. Back around 2002 in the public high school I taught at we had a night janitor who came in well after the kids were gone, a black man about 40 years old, and not the brightest bulb around. But he was a natural stand up comic; he loved to tell racy jokes, and he was funny. Usually there was a group around him listening and laughing at these great stories. One of them was a black teacher who laughed along with everyone else.... until she got pissed at him for some reason. Then she turned him in to HR, threatened to sue, and in a CYA move the district fired him. He had no idea he had done anything wrong, he had a wife and kids. He was about a year from being vested in a good public pension. He**, back then none of us knew he was doing anything wrong. The district didn't warn him, they just fired him outright. After that I watched everything I said to female teachers and staff. Cut back a lot on interactions. But we also had a female counselor who kept a bottle of booze in her desk drawer and sipped all day long. That only got her an order to get rid of the bottle..... which she ignored.