I remember back in the 80's when there was a fair bit of trouble at football games, the weapons of choice were things like darts, sharpened 2 pence pieces, stanley knives (with the option of having 2 blades in with a matchstick between them so the cuts could not be sutured) and the chealsea brick (a newspaper folded in such a way that it is pretty hard when hit by it).
So in essence you can ban knives all you want. If someone wants to damage you then they will damage you with whatever comes to hand.
Most of the knife crime thing is blown out of all proportion. Perhaps they should consider banning cars as they kill lots more people in the UK annually.
