WaPo ‘I know about the secret’: Men in affluent neighborhoods are getting shakedown letters Jeff Strohl’s stomach dropped when he checked his mail on July 21. “I know about the secret you are keeping from your wife and everyone else,” a mysterious letter read. “More importantly, I have evidence of what you’ve been hiding.” The letterwriter, GreySquare15, threatened to expose a secret — unless Strohl wired the sender $15,750 in bitcoin. “First, it’s disbelief. Then, a sinking feeling in your stomach — you search your soul and say ‘What have I done? What secret is actually damning?’ ” Strohl said. “Then, you recognize, I don’t have anything that’s gonna bother me if other people knew.” ..