A friend and I play on a server with a few other guys, and he made his own secret room (even from me) to hide stuff… I saw him go in there and took screenshots, and sent him this GIF with the following message:
I have proof of your secret room. Deliver 10 diamonds to my house by tomorrow night or I’ll send this GIF to everyone on the server.
We’ll see if he ends up paying or not. Blackmail is fun.