Prank Idea: Letter From Another Place
One of the great pranking strategies available to the solo prankster is letter writing. All the work can be done from home, and prank delivery is handled by the US Postal service. How about sending a letter that explains that all graduating seniors will be required to attend a Choosing Ceremony to determine which faction they will spend the rest of their lives with. Or send out congratulations that students have won a trip to the Capital (where they will be required to represent their district in a fight to the death). A lot of Young Adult fiction is a metaphor for high school anyway, so look for something you think would make a good fit. (When in doubt—acceptance letter from Hogwart's!)
What do you want to do (or what have you seen done) at your school? Let us know in the comments below.