Its possible that isnt someone attempting to troll and is just someone not aware those are sound-sensitive mobs. I didnt know that, so im sure im not the only one. And indeed run behind _____ is often a good strategy. But i also remember this quest. I managed to sneak all the way there, and as i was watching the pattern of the undead to try figuring out my opening a CE spawned nearby and i got accepted/ported in. By the time we were done it was daytime, and the quest line about the area being more dangerous at night made more sense. It was literally empty when i returned, and i casually walked right in.