If you're ever tempted to take a weapon into school, to settle a score, or to carry one on the street for protection, then DON'T.
Carrying an offensive weapon is a crime and if you are caught with it, even if you have it in your pocket, you are likely to end up in youth court and expelled from school. An offensive weapon isn't just a knife, it could also be something you use in maths at school, like a compass. Using a weapon on someone else is an assault.
But worse, fighting someone using a knife, perhaps to frighten them, can go tragically wrong. People DIE in fights where knives are used.
If you take someone on in this way, perhaps for revenge, because they've upset you, you run the risk of hurting them and getting hurt yourself. If you're feeling angry because someone has treated you badly we can give you lots of practical advice to sort the problem out - safely, so nobody gets hurt.