You work in a large office in the "bullpen," a large open area of desks, chairs and computers, where about 50 people work, separated only by low-level cubicle walls. In this area, several teams of people work together on different projects. Lately, there have been a lot of pranks played by one rowdy team upon another team (not yours), which have escalated. Yesterday, someone lowered the seat of a worker's chair while he was out of his cubicle, and when he returned and attempted to sit down, he fell and bruised his back. No medical attention was needed. You believe this conduct needs to stop, but management has so far ignored the situation. What should you do and why?