HR is there to protect the company. When the money the person represents is greater than the sexual harassment lawsuit, they cut the check and the person sits in 15 minutes of 8 hours worth of harassment training and they are back at is soon enough while you are out on the pavement explaining why you are no longer there (you darned troublemaker). So why report?
Lincoln didn’t care about Grant being a womanizing alcoholic, he only cared for results. That is the mantra we have to live by.
What you have to do is get a hold of this behavior when these people are new to the system because you can’t put the toothpaste back in the tube.