You see, criminals use them to commit crimes, so obviously the solution is to ban the knives. What? Throw the criminals in jail? Teach that people are actually responsible for what they do instead of blaming the objects? What a cruel and unprogressive idea that is...
Listen to this: "Offensive weapons are defined as any weapon designed or adapted to cause injury, or intended by the person possessing them to do so." Take note of that "intended by the person possessing them to do so"; that means if someone has had their life threatened, and they carry anything for the purpose of self-defense, they're going to jail. No difference between something carried for self-defense, and something carried by a criminal. Which has led to such incidents as the old lady arrested for carrying a pepper pot in her purse. Wonderful.
This is at the end of the article: "A spokesperson for the Association of Chief Police Officers said: "ACPO supports any move to reduce the number of knife related incidents, however, it is important to consider the practicalities of enforcing such changes." So they are at least considering the reaction when they tell people 'take your knives to the police station to have the points ground off, and by the way we'll be coming into your house to check the kitchen and workshop for any you may have forgotten".
I repeat what I've said before, this is what happens when you continue down the path of blaming objects for what people do.