Found this memory stick in the library at my school.
Trips decides what goes on it before it goes to the lost and found.
Gore images/videos and torture how to docs
Replace insides with USB killer hardware,or at least a switching boost regulator connected to the data pins.
Confused can be good
Write a note that reads like an e-mail you sent to friends telling them not to show up to school on Friday because you were going to commit a shooting.
Put the name of a class mate you don't like for extra points.
Has to be fake, no one loads a flash drive they just found onto a PC running their main OS, they at least load up into a Linux live environment using a distro with reduced functionality, on a public PC, to minimize potential for hard to you.