You know, a fire alarm is hardly a true prank. Any fool can do it, and I wouldn't necessarily salute something any fool can do. True pranksters, such as myself, have earned the respect of others through our nefarious acts and ingenious plans, such as this one:

When I was in high school many years ago, me and several other cohorts banded together and screwed with our school office. All it took was about 6,000 ft of fishing line. All of our classrooms had an intercom system, where the intercoms all had call buttons in the classrooms, in case of medical emergencies, civil disturbances, or what have you. We tied fishing line to the call buttons, loose stapled them to the walls, over carpet, behind/around desks, and had the lines set up to where all you had to do was tug the line to activate the call lever. It's not exactly easy, since you have to keep the line hidden from being tripped over accidentally, which means you have to run around the room away from the main door and also avoid running the line amidst the pathway between desks. But the way the lines were set, you could not tell a point of origin, as far as who had pulled the line, in a room full of 15-25 students. Sure, you'd have some rooms with your usual suspects, but we also enlisted Valedictorians help as well as the social miscreants alongside the football players. It was an act of beauty I got to witness first hand in the office, having 40+ rooms all randomly calling into the office via intercom, watching the 10th grade office girl flipping out because she didn't know what was going on. They had service people running around, and one found the fishing wire. None of the guilty parties got caught, although students were encouraged to come forward about the event. Accusations were made, but no one got in trouble at all. This was one of my better pranks, but hardly my best.