Like I know it's super fucked up to surreptitiously dose an unwitting mark, but wouldn't forcing a breakthrough experience on chuds help lead them out of darkness?
Here's a video of when the UK government did a field test of army members on LSD. They basically dropped their arms, stopped taking orders, and just wanted to play.
The problem is dosage. You dont want them to be freaked out forever, and a supersoaker is no way to control volume.
....putting a couple drops per bottle in a pallet of water, then leaving that pallet with the rest of their supplies and simply waiting, would probably be a safer, more controllable way to change people's faction in Minecraft, with the added bonus of spreading distrust.