"In the past, [Boys' College students] have put their urine into water guns and thrown dead, rotting fish at people. They chucked eggs one year and I was unfortunate enough to get hit."
And the girls retaliated, she said. "One year, we had a huge water hose and we squirted them when they ran through the school."
She was aware past students had been disciplined for their actions but that didn't stop students from continuing the tradition.
"We do it because it's a bit of fun and for a bit of interaction with the boys' college. It's not supposed to be offensive ... and as long as no one gets hurt then I think it should continue to happen and the schools should allow it."
Another Year 13 Boys' College student, who did not want to be named, said some students burnt their school uniforms the day after school finished to celebrate the end of their high school learning.
Tauranga Boys' College principal Robert Mangan said he wasn't aware of any unplanned activities that weren't supported by the school. Tauranga Girls' College principal Pauline Cowens could not be contacted for comment.
NCEA and Scholarship examinations begin on Friday, November 9.