OK, so I'm watching "MythBusters" (I love that show!), and they are doing an episode on moonshine dangers (explosions, fires, etc.), while the Build team is testing using 'shine for fuel. Adam and Jamie went to the trouble of getting a distilling permit so that they could do the episode on TV in a legal sense. I did a quick search on the 'net, and even went to the Treasury Dept.'s website, but I can't seem to find the answer to this question; if a glass of beer equals a glass of wine equals a shot of hard liquor, why is distilling liquor illegal without a permit, but brewing beer or fermenting wine legal? At what point would a permit be required? My interest is in using it as an automotive fuel. Yeah, yeah. Seriously, a friend of mine brought me a sample, I took one small sip, and thought my stomach was going to melt. Is it efficient enough to use it in a heating system?