This may be a little pessimistic, but if we imagine that zombies only die by destruction of their brains. AKA headshots (which is not the case in this game). By what i have read, it would take a very long time to actually kill a zobies brain with a molotov, and then it would be pretty useless against zombies. The Dayz-zombies seems to be able to feel pain though, or it sounds like it when you shoot them. Maybe the molotovs would light them ablaze and cause them to run around aimlessly for X amount of time. Later, some other survivors would come to the village and be like "oh, burning zombies, let´s go somewhere else..." is this somewhat inspiring/interesting or am i just plain dumb and boring?