Oh man, yeah also adding to the list of people that abused their highschool computer labs with this. We had so much fun, but we eventually drew the ire of the school IT admin. After class one day the teacher took us aside with the admin and asked if we had installed BO on the computers, which we of course denied... they "believed" us, heh, but gave us a stern warning that whoever was doing it should stop. We would have all probably ended up with felony charges these days.

The next year, so 1999, we actually got approval to attempt to change our grades as an exercise. We actually managed to do it by sneakily copying a floppy one of the teachers used to store their grades with a program called Integrade. We took it home, reverse engineered the password protection to disable it, changed our grades on the copy, re-enable the password protection with the original password, and turned that in as our proof. Our teacher was impressed and super sketched out/nervous at the same time. I guess they never considered we'd succeed and get access to the whole class's grades...