There are a fair number of claims about supposedly haunted places or items, and some of these claims have been documented in articles and documentaries with somewhat specific claims (e.g. here) of specific supernatural phenomena. That is, instead of claiming "X is haunted", a more specific claim is made such as "X ghost gives you cancer if you don't offer it a sacrifice" or "Pregnant women who spit on this particular pirate's grave have a greater likelihood of miscarriage and birth defects".
Are such claims on-topic? Obviously, questions like "Is X haunted?" is probably too vague a claim, but some claims of hauntings include more specific claims, such as that a large number of people who have been disrespectful to the object have had subsequent medical problems or that specific visual effects are seen if certain arcane rituals are performed. If they are on-topic, are there any best practices to keep in mind when asking about them?
Many of the specific claims of hauntings that I have encountered seem to be ones that could in theory be scientifically verified through experimentation (e.g. a double-blind longitudinal study of health outcomes among people exposed to a supposedly cursed graveyard at age 25), but turn out to relate to objects or places that are conveniently unavailable for serious research - secluded on private property (requiring one to trespass to get access), requiring difficult-to-obtain permits to study, etc. The Stull graveyard in Kansas is an infamous example - claims abound that a certain mythological creature appears there on Halloween night, but the property owners have refused for decades to allow any serious study and actively work to bar investigators from entering.