And what's the antidote for Methanol poisoning ?........I wouldn't worry about methanol in freeze concentration. The thing with heat distillation is that the methanol comes out first, so that the heads contain potentially dangerous levels of methanol.
Freeze concentration doesn't fractionate but just removes water. So if you are at 10% ethanol and 0.001% methanol to start, you might end up at 30% ethanol and 0.003% methanol. Yes there is more methanol, but there is equally more ethanol so you will drink less of it and end up drinking the same total amount of methanol.
Ethanol