I mean, since the paranormal doesn't exist unless the people in the house died due to some kind of environmental factor then the number of people who died there is completely irrelevant to the new residents, and does not in any way increase their likelihood of harm.
Really it just lowers the rent or mortgage, an objective win for the new residents.
I'm not gonna name names, but imo Lemmy already has a couple of its own Gallowboob-types who just mass repost any and every shitty meme they see to multiple communities, and have already gotten high off their minimal Lemmy-celebrity status. I get Lemmy needs content, but personally I have no interest in seeing Lemmy just become a place for Reddit hand-me-down memes. So yeah, there are definitely a few users that blocking them will significantly improve your Lemmy experience.
edit: typo