I can also tell you from personal experience that hauntings can be a highly stressful event for a person to endure. Some hauntings are peaceful and harmless, and those don't stress out most people who experience them. A person feels quite a bit of internal strife resulting from an aggressive haunting as that person wonders if he's really experiencing what he's experiencing. Second-guessing your own senses all the time begins to wear on you. As a person's fear level rises, his stress level shoots through the roof as he feels that his home--the one place he has to completely relax in--has been invaded by something he doesn't understand. Hauntings also place extra stress on the relationships between the people living in a haunted location, especially if one person doesn't believe there is anything paranormal going on in the home. People living in a haunted house also might feel cut off from the rest of the world, and so they're not as diligent at keeping up friendships, etc.
I'm not entirely sure what it means, but since I was a small child I knew I was "sensitive" to these sorts of things. At first my experiences were tame or not scary. It wasn't until I was in high school that I had my first encounter with an aggressive, even violent entity. The experience shook me to the core, especially since nobody really knew what to do about it.
Since then I've had many other experiences with aggressive and violent hauntings. It doesn't matter how many times I experience them, because it always stresses me out. I lived in one particularly active house during a particularly stressful time in my life. I was working full-time and going to school at night, which meant I was up late at night all the time. I constantly felt like someone was standing behind me when I would sit at the desk in the basement. I would also hear noises upstairs like someone walking around and doors opening and closing. When I was home alone in the daytime I would hear knocks on the front door and would catch glimpses of people running past the windows, outside the house. As time went on it became more aggressive as it started calling out for both me and my wife both day and night. At first we thought it was our kids, but they were always fast asleep or not even home. Late one night I heard a voice say "daddy?"crystal clear from the hallway that lead to the bedrooms. When I turned to look, expecting to see one of my kids out of bed and saw nothing, the same voice laughed sinisterly. Just a few days later I began feeling someone lightly placing his fingers on my shoulder or back while I was working or studying. That eventually turned to fingers grabbing my shoulder or poking me hard in the lower back.
The house I live in now is not active at all in the paranormal sense, and for that I am grateful. I run into people on a fairly regular basis who seem jealous of anyone who has experienced a haunting firsthand. These people fail to understand that while some hauntings are harmless and might even be "fun" there are many people who are terrorized in their own home by a force they find hard to deal with, leading to excessive amounts of stress and even depression.