Bullying is a Crime against School, it is unwanted, aggressive behavior usually caused by a school student (Bully) to inflict insecurity, dominate, and humiliate towards another student. Bullying can lead to emotional/physical pain and sometimes even death.
Bullying is a common factor in school shootings and sometimes even the lone cause for it.
Common effects of bullying can be:
Depression, Anxiety, Low self esteem, Isolation, Mood swings, etc.