I would think that if it’s well known by locals and/or has caused issues, you’d have to disclose the stories.
Per a prominent legal site, seller and sellers’ agent would be wise to disclose, since a court might order that the deal be “unwound,” etc.
I say “when in doubt, disclose, disclose, disclose.”
https://www.legalzoom.com/articles/ghoul-disclosure-must-home-sellers-disclose-paranormal-activity