I'm going to rat out classmates who used teacher's login info to fix their attendance
Why would you rat them out?
It's not fair and I'm always the one getting the shit.
It's good to report wrong behavior, but no one likes snitches. Report them anonymously so that no one finds out it was you.
I'm going to rat them out and then laugh at them.
Well I don't think you should laugh at them, but they do deserve to be told on if they are doing something wrong.