i don't live in america im in the flat land of Norfolk although your not the first on here to say i live in america.
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I didn't think you did
However "Dood" on the forum that you linked to who made the points about living near a sugar factory does in fact live in Orange County California
For me, I have no desire to make rum - its far from my favourite spirit
I did grow up in a household though where all sorts of interesting chemistry was encouraged (my father has a doctorate in the subject and lectured on it ). Back in those days a proper , laboratory glassware still using fractional distillation columns rather than simple thump keg and copper condenser was part of practical hands on chemistry for students so, thankfully, I know a little about the subject. I really cannot see any chemical basis for sugar beet making any different type of ethanol than sugar cane - and indeed many places do use sugar beet as the basis for "legally" distilled spirits and it tastes just fine
also its ethanol produced at the final stages of distilling that you need to discard.
To a degree - although the "tailings" (final distillate) is a matter of taste. The "headings" (first distillate) will bring over any methanol which is a more dangerous material. If the wash / mash was well made though, it is a tiny amount.
Most of the "sends you blind" type moonshine did so because the final product was both poorly distilled and adulterated with industrial alcohols.
In the round though, I do agree that whomping up a still is potentially dangerous (naked flames an alcohol vapour are a dodgy combination). You wouldn't catch me doing it. I like my whisky legal, non chill filtered and aged for 20 years in bourbon then port casks