Look, sometimes Bill from work gets outta hand and you need to up your game. If the whole Office Space smashing the printer thing, isn't exactly an option, why not opt for the more practical pen-firing crossbow made from simple office supplies? Everyone will know you mean business.
And by "mean business" I mean the exact opposite. What I actually found great about this design is that it looks relatively fearsome, which makes for great fun. But can only shoot about twelve feet, giving it just enough pizzaz to make my buddies cower/retaliate, without too high a likelihood that we'd actually shoot each other's eyes out.