When I first started doing Zombie Roomie, I was really looking into the zombie fan culture on the internet and I saw the same question again and again...
Were Frankenstein's monster, mummies, and Jason Voorhees considered zombies?
Sure each of them is undead and reanimated some how... but each have things that count against them too. There were several "knock down, drag out" fights on various forums and podcasts about it. I figured it'd be something that would potentially piss George off too.
Planning this arc, I was just going to have zombies in the group but I realized that the number of non-Union zombies in the area would be pretty low
due to events last year. So adding these guys in to the support group gave me a chuckle.