e-tattle
Sending an email to someone and adding a bunch of people who can scold you if you're wrong, just to rub it in that you're the smartest person in the room.
I sent the email to my coworker and my boss, just to show how much I knew.
He got yelled at, so I sent the email to him, his boss, and the HR lady.
She missed the deadline, so I emailed her and the whole team, just for fun.