So years ago there was a UPS driver who was delivering things to my GF's office building. Her office was mostly young attractive females, so this guy used to just hang around the office and try to chat them up.
My GF was asked to call UPS and complain about the guy, and when they told him to knock the shit off, they actually gave him her full fucking name. Later that night when she went home, he was parked in his truck outside her house. No joke.
I called UPS to get it straightened out and they tried to stonewall me. I got the full name of the person I was talking to, and I started reading off names to her from Jigsaw.com of various managers, directors, etc and told her I'd be e-mailing them all to let them know how she had handled a very serious and potentially dangerous situation.
I also mentioned that, while my GF is 5'4 100lbs, I'm 6'5 and a gun owner, and if he shows up again he's leaving feet first and I'll be announcing her name to the media and to the police when they ask what happened.
Two days later the guy was in a police station crying in a room full of cops and private investigators. So say what you want about "wasting your time", but the shit works when you need it to. Nobody wants their name attached to this shit, especially when you tell them that every employer who googles them for the rest of their life will read whatever you want them to read. Losing your job is almost guaranteed if that happens.
That's a 100% true story, albeit the most extreme example I have to date.