Really?? As long as he didn't try to pass it off as real, I wouldn't think there would be any problems with keeping it. Kinda like copying dollar bills on your inkjet - but if you don't try to spend it or use it as currency, then how can simply owning it be illegal?
Btw, great find on the cointalk post. I was thinking the same thing before going there - a cheap, though profitable counterfeit. If made of steel, or even stainless steel, profit margins could potentially be even higher, especially of these are made from punch press waste and gotten free. Could be very lucrative for someone with the right connections and the desire to make such a monstrosity.