Intelligent hauntings are those in which the ghost interacts with the present.  It is intelligent, in
that it may communicate with those on the earthly plane.  The disembodied personhas
elected for some reason to stay or maybe just visit the physical world, due to a connection
with a person, place or thing.  Intelligent hauntings may also occur due to a spirit's
compelling need to deliver a message from the other side of the grave, or to watch over
loved ones.  In addition, it is also plausible that intelligent hauntings occur due to
attachments the ghostly person feels through memories, trauma, tragedy or any other
emotional tie, effectively binding the mind to:

1) maybe not realize the person;s body is indeed deceased
2) completing unfinished earthly business
3) re-living traumatic events, as the mind replays the event in trying to comprehend
4) perhaps hang around loved ones or persons the ghost finds like company with
5) not letting go due to fear of death and moving on to a new world

It is important to understand that there is no devil, demons or evil spirits as traditionally
taught -- just disembodied people with varying personalities.  Some ghostly people, are
negative, while others are positive and very upbeat.  One may imagine that many people
you meet here on earth range from joyous to downright angry and dark.  Ghosts, or spirits of
people are no different.  One must understand that a person does not lose the mind he or
she has upon death of the physical body.  Though not common, angry spirits can be
encountered, no doubt.  And to be trapped in the earthly realm as a spirit is a form of hell; for
it is fear that holds ghosts of intelligent hauntings here no matter what the intent.  Whether it
is worry about someone, anger of having died and suffering loss, condemnation or doubt, all
are simply different forms of fear found in the lowest part of hell called the earthly plane.  
More can be garnered about this in the Spirit World.  Ghosts, or people trapped in fear do
not need "cast out," or "exorcised;" they need patience and understanding - from one human
being to another.  For it has been said, "Ghosts are people, too."

Intelligent hauntings manifest typically in what some may consider "signs." Hiding or moving
objects, doors opening and closing, strange sounds, spiritual presence (goosebumps, eg),
disturbance of electrical devices are all examples of ghosts attempting to gain someone's
attention and communicate from the spirit realm.  One may also experience dreams and
visions of loved ones, especially right before or after sleep when most are open to contact
(and the left brain is quieted down).  It is also not uncommon to physically see a ghostly
loved on, as well.  The best thing one can do is remain open to the contact and listen to what
is heard deep within, as that is how ghosts primarily communicate.  Speak to the spirit, your
ghostly friend, in words of peace, understanding, blessing and love.

Portal hauntings are widely debated and yet much is known.  Some ghost hunters believe
that portals exist between the physical and spirit worlds.  Portals would then act as a door for
ghosts to cross over from the other side to the physical realm.   Others believe portal
hauntings to be doorways between the earth and other dimensions...even other worlds!  Still,
no one knows for sure if portals actually exist and if so, what they may be.

Some paranormal investigators believe that strange entities (that appear other-worldly and
do not seem human) captured by ghost photography, seem to be around areas with high
activity and are thus suspected to be portal hauntings.  These portal hauntings have also
been identified as having a high occurrence around graveyards or near underground
waterways for some reason.  Some have fostered the notion that graveyards may have been
built unknowingly, yet guided by the subconscious or higher powers that be, in areas that
portals exist.

With all this said, we simply do not know if portals exist at all.  It is interesting to note that
most near death experiencers recall going through a tunnel of light during their cross over
from this world to the next.  But can this tunnel of light work in the opposite direction, and
allow ghosts or disembodied persons to come back to earth and visit?  And are there other
tunnels or portals that may explain some of the strange type of hauntings people have
experienced?

Finally, in ghost photographs, many ghost hunters strongly believe that "vortexes" are
evidence of portals.  A vortex usually appears as a streak of white ectoplasm mist, and is
typically confused with photos of mistakenly snapped camera straps in front of the lens.

Poltergeists or poltergeist hauntings are most likely not even hauntings at all.  The German
word, "poltergeist," means "noisy ghost."  A common thread between different poltergeist
hauntings has strongly indicated that they are caused by psychokinesis (the ability to move
things by power of the mind alone).

Usually poltergeist hauntings center around an adolescent girl (although young males and
even adults have exhibited the same phenomena) in the household.  Typically, this central
person is usually emotionally disturbed in some fashion, and is the root cause of objects
moving, knocking sounds (and other noises), the turning on and off of lights and electrical
appliances, etc.

What is interesting is that the person whom the activity centers around, is unaware that they
are the one who is creating the disturbance.  But in true poltergeist hauntings, none of the
activity will continue after the person is removed from the environment, as they are not there
to create it.  Poltergeist hauntings typically will go away as quickly as they began.

Visit here to see a poltergeist video example.