I have come across a certain special darling's homebrew set up. He is underage, waaaay underage. Now, I must admit, part of me is impressed. For my own personal reasons, I have decided to sabotage his efforts, rather than confront him, for right now. So...what do you suggest? Since he is attempting to make hard cider I thought a 1/4c of apple cider vinegar might do the trick? He has it in quart jars, so I was thinking a 1/4c for each quart. Will it stop the fermentation process? Any other sabotagey ideas that can go undetected?