Bullying....
I remember the man addressing the media after his son had been bullied and then was named Top Nerd In School by the students. His son killed himself after their gag poll.
“You may have thought it was funny and that you felt good about yourselves for that. To you he was just a nerd. But to me, his loving father, he was my son and I’ve lost him because of you.”
Frank, I would take it a step farther: “My mission for the rest of my life is to make your lives as miserable as possible. It will happen when you least expect it.”