How did you mess with school computers?

discovered a workaround that i could get to the C drive, then discovered a program that could change the wallpaper and info text on the computer (the change was local to that specific computer). had a little bit of fun with that a couple of times. i also brought in a USB stick with Linux Mint installed on it and booted to that whenever i had free time (i mostly browsed the safe side of the darkweb [back when it was still interesting] and made keygen music in OpenMPT). fun times those were. also booting to mint led me to fully switch to linux so ye :)