That's just a Lovecraft easter egg, there was a whole village as one in Oblivion
Speaking of Ghost People, with their gasmasks and jumping around they remind me of http://soc.stalker-game.com/?page=snork from S.T.A.L.K.E.R. a bit.
See, Lovecraft isn't exactly famous for Sci-Fi horror. While contemporary fantasy may have some Sci-Fi element (or vice-versa), Fallout just isn't one of them. The whole Dunwich business would have been a lot more "Fallout" if Bethesda crafted it so, like a pre-war artist sculpted that statue out of radioactive marble, then subsequently turn into a Ghoul and wrote the tome which people confuse with reanimation.
Although I felt there could have been more background about the Ghost people, Chris obviously left it out to keep them all more mysterious to increase the fear factor.