Zombie slaves are not something that should ever be added. It sounds ridicolous and belongs in The Walking Dead. I mean, cmon man this is fucked up. Maybe it could be possible in real life, but this is NOT something that should be added in Project Zomboid. But this is just MY opinion. As I've said before at other suggestion, this could be an excellent and fun mod, but that's it. I don't feel like the developers should use their precious time and hard work on such a thing as zombie slaves. They're working their ass off already