Banning knives wont cure crimes or even reduce the crime level,If my intention is to harm someone and my knife is simply an instrument of my intent then it could easily be replaced by a piece of broken glass,a screwdriver or a sharp stick!A knife is more than a weapon it is a tool and to the masses who use knives daily,for something like CUTTING MEAT! or a maybe a loose thread from a jacket the last thing I usually think of my knife as is a weapon.It can of course be used as such.If I run someone over with a car,does that make all cars deadly weapons?This is typical of our society to blame anything but the person who does something wrong,nothing is ever anyones fault ,the blame is always on knives or firearms or videogames or movies or TV violence.