Here are a few ideas, none of them would be considered vandalism, and no one would get hurt. They are temporary, and can be cleaned up. I have three ideas for high school prank. Tell me which one you think is the best. By the way, I know how I could set these up without getting caught. 1. Get five radios. Put CD's in them with a sound of a girl having an orgasm for five minutes. Put each radio in a locker throughout the whole school. Lock the lockers would huge master locks. Put volume on full blast. Get four other friends and give them remote controls so each guy can set off the radio once the radios have already been locked inside the locker. Use a remote control to set off each radio at the same time. Make sure this is done during class time. Then watch everyone laugh their asses off, for everyone can hear a girl having an orgasm at max volume. Teachers will try to break the locks on the locker, but it will take quite a while. 2. Go to school at midnight, and change the high school's headlines in front of the school to something like SCHOOL IS CLOSED TODAY! 3. Go to the roof of the school, and get huge rocks or something and make them spell out ALCATRAZ. In my opinion, I would want to do the orgasm one most because you can see the reactions soon after the prank is done. For the Alcatraz one , it would be pretty funny. As for the school is closed thing, it wouldn't be funny, but it would just be a free day of school, and people would be talking about it. What do you think?