I'm thinking of potentially harming a student/teachers career
Why do you want to harm that student/teachers career?
I do it because I want to be a lawyer and I want him/her to pay for the wrongdoings he/she have done to me. I like to correct wrongdoings.
That is wrong to jeopardize your teacher's career like that. If you have no reason or source of wrong doing it seems really low to hurt them. If people found out you lied about this they might not want to be friends any longer.
I should be free to do whatever the fuck I want, he/she shouldn't have done those things to me.
It is wrong to ruin someone's career if they said something hurtful to you. If you have a problem it would be good to talk with them about it and tell them how you feel they may have sympathy and want to apologize.