You didn't understand what he was saying. Ardis never said anyone was putting actual venom in the water. He said it was venom-derived pharmaceuticals and nanoparticles. It is common in the pharma industry to research venoms and poisons for insights into designing novel molecules. Not much of a stretch to imagine someone with nefarious intent designing venom based poisons that can be carried by a water soluble lipoprotein and dispersed locally. That's what he was explaining.