No action or even tardy action costs. Take a look at HRLegalNews.com's Same-sex harassment costs company big:
The same blog published Company burned when manager didn’t react to complaint - which shows again the costs of tardily attacking harassment.A male employee claimed he was sexually harassed by his male supervisor. After he made several complaints, the alleged harasser was demoted and moved to a different department. The employee sued anyway — and won.
The company argued it handled the situation appropriately by moving the manager to a different job. But the judge said it didn’t act quickly enough. The employee said he brought his complaint to five different supervisors, but no one did anything until he talked to a union representative."
Employers have a method set up to handle sexual harassment claims and then use it.