Ninja Star Push Pins
Ninja note attack
There are many nonverbal signs you can use to let those in your office know how you feel about them. You can leave a sticky note saying "Good Job" on their monitor. You can put laxatives in their coffee. Or, you can do as the ninjas done did: stick an angry note on their cubicle wall with throwing stars. Of course not real throwing stars, but Ninja Star Push Pins.
Each set will bring you three Ninja Stars of posting doom. Each star has one corner cut off and replaced with two push pins, so when they are embedded in the wall (or cork board or foam board) they look like they were thrown with great force. And apart from looking cool in the wall, the stories of how the Ninja Star Push Pins got there in the first place will quickly become the things of office legend - because nothing adds emphasis to a sign or note like a Ninja Star.