The show seems to have kept up with the whole people doing stupid things too, fat girl (who shouldn't really be fat after living on rationed food for a long time) decides to needlessly open doors by herself and then starts gobbling off loudly when they're outside the wire.... Forget the fact they were ambushed by humans even you'd surely keep you voices down regardless thanks to walkers responding to sound. (Frankly you'd try to travel at night, not use roads when on foot, plan your route in advance and not split up because someone is being stubborn about which route to take etc etc...