Board Thread:Speculation House/@comment-24901923-20141018140231/@comment-24901923-20141019202712

They probably cleared out a fair number of Grimm to acquire the underground base. They are also likely trying to control their emotions and avoiding getting worked up to prevent any more from being attracted. The negative energy present in the ambient environment could also help mask their presence, since there is probably so much of it and there are likely only a few hundred WF operatives in the base, in comparison to the thousands of original inhabitants that died in the first attacks.