I actually like the direction this thread is taking. And I think it brings up some excellent points.
So many people hear "Haunting" and they hear "Ghost" or "Spirit" and instantly some vision comes to mind of some non-human entity almost alien in nature which "infects" and area. Unfortunately Hollywood is largely to blame for this.
The most important thing to remember is that a Haunting, Spirit or Ghost is simply a person that is in a different form. They're still subject to the same psychologies, quirks, emotions and sometimes tantrums as they were in life. The exception is that at times they may have changed a bit because of experiences that have happened after their passing. And can also be affected by how they perceive time. But the root thing to remember is that they're just people.
Some people are shy. Some people are not aware they're dead. Some people are loners. There's so many different people and each one is unique. Some people have something to say and want to be heard. Others are lonely. Yet others just want to be left alone. And yet others have sinister goals.
Also remember that spirits that you may encounter may be from a variety of different time lines. Camera's may not have existed when they were alive, or at least not cameras in the form such as what you have. They may perceive you as some form of alien.
If you wish to get a different perspective on this, go watch the movie "The Others", it had a very interesting and enlightening perspective.