We've all been encouraged to reduce, reuse, and recycle to help the environment, but helping Mother Nature can have its own consequences. Case in point: this simple block of wood called the Stix, which is strategically notched to let you reuse sticks or dried-up pens to construct a working elastic gun. Great for conserving our natural resources, but terrible for the poor co-workers caught in the crosshairs.

Assembled from nothing but discarded or unwanted materials and a few elastics, the Stix gun will help balance the guilt you feel from hitting your target by reminding you that in a roundabout way you're helping the environment. Is it a convoluted way to justify being a jerk at work? Probably. But we're sure your co-workers will accept that the good you're doing far outweighs the bad. [Firebox via Coolest Gadgets]