Has there been any POSH case around you in your office? (Including both real and fake)

We have been taught so much about POSH guidelines from our HR or our colleagues. Every time we are reminded about the existence of POSH and how we should not even respond to a girl. So here I'm asking you guys- Is this overhyped or POSH has some real value. Please give any incident you witnessed during your career in Corporates