So you make a dart-shaped mold. You get some pewter from the store. And then "apply heat." Right .. like you're going to have a blowtorch in the airport terminal. Hell, you might as well build a forge, find an anvil and hammer, some charcoal, an urchin to work the bellows .. and make yourself a bloody Samurai sword!
These ideas are all quite silly really. Chucks of Liberty? And how far are they going to get you, exactly, in your fiendish terrorist plot? You swing, I duck, you miss, and then I shove those silly looking pointy magazines right up your ... Well, you get my drift.
At least the creator wasn't afraid to look like a complete moron while striving for his 15 minutes of fame. And his point could be made without quite so much foolishness, eh? Look at prison shivs for creative use of readily available objects.