It's wrong to bully someone just because they bullied you.
John plays baseball at school and the team captain has been really mean to him lately when the coach is not around.
John wants the team captain to learn that he cannot push John around.
John speaks to the coach about his problems with the team captain to ask the coach to intervene.
John starts making fun of the team captain and getting other teammates to do the same.
The team captain is addressed by the coach and starts working on improving his behavior and the team.
The team captain grows very upset and does a bad job managing the team.