Gilly wrote:
Perhaps haunting is simply them 'occupying' a place, rather than their being there with the intention of tormenting people or communicating / interacting with them.
Some people believe that when traumatic things have happened that cause intense emotions, they're in some way imprinted on the property, and continue to reverberate from time to time.
There's also a belief that some people who die don't realise they've passed over, or refuse to go wherever they're meant to be going to, because of unfinished business. So they hang on in the same places they lived, in a state of unhappiness or confusion.
I agree with what Gilly says here. I had this theory that upon death, your physicality or perception of the world around you freezes exactly as it is. What I mean is, the sun may still rise and set, but all those familiar things like furniture and photographs remain the same to you, as that is how you remember the place. If, for whatever reason, you don't move on like you're supposed to, you get stuck where you are until such a time as you realise what is happening.
Time really doesn't apply to 'you' anymore, though you may go on winding the clocks and watching the sun rise. Imagine, being in that state of utter confusion and sadness. All your friends and family have disappeared and you know you should be remembering something, but don't quite know what. Eventually, your house becomes someone elses home and you may occasionally glimpse their shadows or begin to make out the shape of their furniture over yours. You may hear whispers of conversations in strange voices but not know who they are or where they are coming from. Most of us would be a bit pissed, I'd imagine.
This is just a theory, of course, as I've never been dead....or have I?

Have you ever had a dream that you wake up in your place,but things seem different, and after a few seconds you realize your still asleep,you could have even stood up and walked around,but the place had changed.