So what's a Realtor and homeowner to do?
Interestingly, HGTV's "Front Door" real estate site tackled the situation. The article, "How to Sell a Haunted House" might seem like a joke, but there is actually some pertinent information here on how to deal with a property that has, at best, a urban myth problem. At worst, you may one day list a property where something really bad happened that everybody knows about.
It's not cut and dry, and if something has happened there, disclosure may be an issue. From the article:
Other tips from the article:
A second article, from nvar.com, gets a little more into the weeds about what needs to be disclosed and what doesn't when it comes to what the author calls "stigmatizing events" like a murder or suicide, or even whether a previous inhabitant had an infectious disease.
The upshot, in brief: Even if you aren't required to disclose these things, you ARE required to be honest with potential buyers and clients. The entire article is worth a read. Maybe you'll never face this situation, but you're better safe than sorry.