the best revenge

As a pro baseball pitcher, Junho will probably be worth more money than Mean Kang when he graduates.. There's your revenge.
I don't know much about the earning potential of a world class swimmer, but I do know about the millions a baseball player can earn right out of high school if he's good enough.
There's no need for all the gruesome violence (that I'm tired of) you guys keep thirsting for. Just wait till these guys graduate.