You shouldn't retaliate against people.
Lydia has been bullied for a long time at school by a group of mean girls.
Lydia wants the mean girls to be punished for what they did to her.
Lydia forcefully denounces the mean girls' bullying behaviors to the authorities.
Lydia decides to retaliate and plays an elaborate prank on the mean girls, who suffer greatly from it.
The mean girls are punished and Lydia is commended for her bravery in denouncing them.
Lydia is exposed as the author of the prank and ends up being punished for it.