[quote="cjsull, post:13, topic:290958"]
There are different types of hauntings. Beside the demonic, which should be only handled by the Church, there are intelligent and residual hauntings. Residual are just slivers of time being replayed, and nothing to worry about. Intelligent are those spirits that are actually here, whether because of a traumatic death, sudden death, fear of what's to come, or some other reason. They are humans like us, but just confused, or angry, or loving. It's hard to put labels on them. They are as individual as living humans.
Hauntings are either the result of souls from purgatory, demonic activity, or human manifested paranormal activity (as in the case of some poltergeist cases). "Intelligent" hauntings should be applied to cases where the haunting exhibits evidence of an intelligent being at work and should not having anything to do with the mode of death. Places where evil has happened does attract demons. It is possible a soul may be serving their purgatorial time in the place of their demise, but that is by no means a standard: only one of many possibilities. The jury is still out concerning the hypothesis of residual hauntings.
The thing is that your chosen description is one that might be expected from television shows on the paranormal. I wouldn't call it accurate, and it is a prime example as to why someone should not be taking television documentaries as a source of information.
Fr. Ripperger's Seminar on Spiritual Warfare is on this page. This is a nice crash course for the uninformed.
For more information see my list of resources concerning exorcists, which I've posted here at CAF in the past. The list is in these these individual forum posts.You'll find several EWTN audio programs to listen to on the subject.
I'm constantly adding to my library of information. One book I've just run across is Renewal and the Powers of Darkness by Cardinal Suenens. I have not read this yet, but I thought I'd mention it anyway. The foreword for the book was written by Pope Benedict XVI (then Cardinal Ratzinger).
Also, there is a book mentioned in the audio program by Fr. Groeschel, which would be valuable if you can find a copy of it. The book is called Satanby Fr. Bruno de Jésus-Marie (père, O.C.D.). The book is now rare, but I was able to track down the name and publisher from an old Time magazine article.
Purgatory: Explained by the Lives of the Saints by Fr. F.X. Shouppe, S.J. is another good reference resource.
This should get anyone started. There are many excellent resources on the subject. You just have to dig through reliable Catholic resources to find them.