I'm aware that it's currently illegal to melt down US pennies and nickels in order to make a profit from high scrap metal prices (assuming the prices were high enough).
However, given such activity is not counterfeiting nor is it fraud, what kind of crime is it, and what exactly is the punishment for it?
Personally, I have no interest in melting down coins, but if the rise of Bitcoin taught me anything, it's that black markets affect prices (in this case, the real world value of metal coins). Independent of how one feels about this kind of criminal activity, the financial affect of black markets is still real and could affect the price people are willing to pay for coins in the future if prices rise. In other words, I'm not sure the law against coin melting matters very much in terms of how valuable coins will be on eBay in the future.
A related question: how realistic is it for people in Canada or Mexico to profitably (and legally) melt down US coins? Can American citizens legally melt down Canadian coins within the United States?