Obviously you care about your image. So does the school. It wants to create an image of respect, andd... some accessories and piercings don't do that. School isn't that long anyways, it's only 6 hours long and you'll graduate in no time. Flaunt it when your out of school. Also consider the safety hazards. Teenagers are dramatic and impulsive, fights are spontaneous and if I was fighting against someone with a piercing I would rip everyone piercing out... Wouldn't you? xD