I saw it happen a ton in high school. Bullies victimized people constantly and the victim was the only one who ever seemed to get punished. When my kid gets to that age, if I find out he's gotten suspended for fighting back against a bully I will happily take a week off of work and bring him on a father-son vacation. The administration is only ever interested in covering its own ass; bullying is something they can typically sweep under the rug and victims shouldn't be punished for defending themselves.