In my line of work, I often deal with people who have (or claim to have) ghosts in their houses. Inevitably, most of them ask me what they should do about it. Should they move out? Should they talk to the specters, or just ignore them? But the most common question I get is whether or not they should contact a ghost hunter to come to their houses and investigate.
First let me say that over the years I have been involved in ghost research, the vast majority of the cases I've investigated have had perfectly natural explanations. That is not to say that some haven't puzzled me, or left me feeling the house in question was indeed haunted.