Its weird the way they legislate against particular knives... are they going to ban chef's knives? They're big, sharp and can do just as much damage as a 'zombie' knife.
They banned the samurai sword, yet knife crime continued. They banned the switch blade, yet knife crime continued. And they banned any fixed blade above three inches, yet knife crime continued.
Weird... it's almost as if a sharpened piece of metal is a rare thing. The only people it effects are the people who legitimately own these 'weapons'... the people who wouldn't stick them into another human being. Those of a criminal mentality or those without the developed frontal lobe don't give a monkies what these things are branded as or named. They want a sharp piece of metal that looks menacing.
I was discussing something similar with my eldest son... no government can ban anything, they can't enforce anything for the most part. All they can do is bluster whilst the goods are traded illegally, then whinge about how they legislated to prevent such trades. Look at the war on drugs... does it prevent drugs being sold? The attempts to tax tobacco, does it stop the sale of 'duty free'? Nope. Just silly politicians thinking they can legislate to stop the trading of goods. For every person they catch a thousand stick two fingers up at them.
All that said, marketing a blade as a zombie killer is as daft as marketing a cake as a fairy catcher or a magic bean as a giant lure.
I'd love to see a law banning magic beans... not so much the cakes though. All very well preventing an invasion of giants and its all fun and games until you can't buy cake any more!