Three reasons why you should hack into the school computer system:
#1: Let's say you have really poor grades in school. You don't want to work that hard to earn the grades so you get the grades the "easy" way. This just shows that you are a lazy person, you don't like hardwork, and you hate/don't care about school.
#2: A person from your school(could be your friend, bully, etc.) is pissing you off by embarrasing you and hurting your feelings. If you believe you have a good enough reason to change that person's grade because they hurt you, you feel that you should do it. This also might work if you are in a situation where you like a girl/guy and you want to ask them out, but another person gets to them first, you feel it's neccessary to change their grade for them to feel "shamed."
#3: You do very poorly in school, you want to be better then everyone else in your group of student( freshman, senior, etc.). You decide to hack the school computer system and change everyone's grade besides your own to a letter grade one or two lower than yours(you decide not to change the grades of the students that are worse than you because you want to be nice to those who have to suffer starting with bad grades.).