Interesting real estate question, regarding full disclosure.
Would the seller be expected to disclose “ghosts?”
I’m a California RE Broker, and I don’t know the answer.
I would think that if it’s well known by locals and/or has caused issues, you’d have to disclose the stories.
In my state the seller only has to disclose malevolent spirits. Benign ones, no. My wife is convinced we had a nice one (former occupant - deceased).