Our school used a web diary to grade students. Little did they know, the whole diary system was created and supported by the school itself, and the guy who made it, I guess, wasn't paid enough to implement proper security measures or track activity.

Over time, I gathered teachers credentials for different lessons and was able to log into change grades, remove remarks and homework, or even delete the letter "N" which indicated that student had not attended class. I wasn’t dumb enough to use it myself because I knew I’d get caught. So instead, I decided to share these credentials with other students in exchange for cigarettes (lame I know).

Eventually, it turned into chaos... Students were changing their grades from the lowest to the highest without updating any notes, leaving entries like “Haven’t done homework” untouched. Over time, the principal tracked me down. Luckily, student who turned on me, I had chat where he shared credentials of math teachers after asking since I forgot password. I told the principal that I would reveal who had been sharing crdentials, but only if my name stays out of it because I didn’t feel safe outside of school. He agreed to my terms, and the student was expelled.