This woman figured out the key to the best petty revenge.

This is part of Revenge Week, a series about how vengeance runs America, from the White House to cheating spouses to that bad boss who totally deserved it. In the beginning, the fantasy was simple.

In the beginning, the fantasy was simple. I’d send the incriminating text and voice messages I’d saved, and then hear through the grapevine that she’d been fired. That felt good to imagine—an eye for ...