I just had a thought - everyone knows how to deal with zombies these days, but all those ideas are based on the idea that they hunt in swarms, right? But – predators don’t swarm, prey swarms. Zombies would really make more sense as ambush hunters - if you don’t need to maintain body heat, or pump the heart and lungs to keep the flesh oxygenated, you could maintain a low enough metabolism to wait in one place and go centuries between feedings.