I dunno. Seems the authorities down there are pushing an anti- homebrew agenda. I read an article the other day about a south African couple who died from drinking poisonous tepache (fermented pineapple) just seems suspect to me
Would they even be able to survive if it's so CO2 dense? Something is afoot.
*Edit*
I did some digging. I can only find stories of this from people with very long-term (usually secondary) fermentation and a poorly sealed vessel.
It seems gnats or fruit flies are good at getting in to small places with fermenting liquid... So keep your seals strong!
Yes ...... its a SA government policy to publish as many stories of the dangers of home brewing and to discredit the practice to try to back up their terrible and incompetent policy of banning Alcohol during Covid 19 lock down. All these stories are coming from the *police*.