I worked at a State Hospital in TX, and those folks had their favorite recipes, and nobody ever got sick..I think some of them even filtered William's 'lectric shave through white bread for a buzz.
I'm thinking that whatever they were brewing it in..trash can, perhaps? might have had the botulism spores in it to begin with.
You got that right. Years ago in a ROP country far far away we “brewed” up some really goode stuff in large glass carboys that once held acid. (Yes we rinsed them multi-times.) More like fruit wine I guess. We had 3 or 4 ready to bottle carboys twice a month. Nice stuff and was really enjoyed by all on Saturday nights —— to include ROP guests! The great home brew beer was another story! (Love those one liter juice bottles with the ceramic snap top corks.)