There are some terrible people out there that will lie to get what they want (c.f. borderline personality disorder, sociopaths, etc.). They exist in large quantities in the business world.
I've been on the receiving end of false (non-harassment) accusations and it sucks. I now take precautions to prevent that from happening again and I don't think it's unreasonable to expect that BPD or sociopath women would use false harassment accusations to achieve their means.