Coudal Partners published a PDF of business card-sized printable handouts designed to be given to people when they are annoying you. I don’t know if the cards are meant to be a joke, but they would be a very creative way to tell someone to “pipe down.” The PDF has a variety of styles and sayings to check out. I would only recommend passing a card to someone that is smaller than you so you don’t get beaten up. I think these would be hilarious to introduce into the workplace. The link included below goes directly to the PDF.
Be quiet cards – [coudal.com]