I want this kid expelled from school.
Why do you want to get the kid expelled?
I feel like getting revenge on someone who rejected me.
That is a petty reason to get someone expelled. If the school finds out you are setting up students they will expel you instead.
I'm going to do it anyway because no one will know it's me.
I think they have to investigate your allegations to get them expelled. There is a very high chance if you are lying they will find out about it.