Meh. Interesting, but you can't see outside. The dog looks pretty interested at something just on the other side of the door. And without knowning what kind of blinds those are it's hard to say what might be operating them. They have blinds that are inside the windows now that you can control with a remote. So who knows what that is.
Some of those are interesting, but most look "suspicious" to me. Especially the so called poltergeists. As a rule you should be skeptical if you can't see all parts of whatever is moving. Like the chairs or tables. It's soooooo easy to rig stuff like that up to move and position a camera up in just the right spot. Some of those videos look a little fake too.
I'm an avid Ghost Hunters watcher myself. I especially like how they go into a "haunting" trying to debunk everything. They've dismissed many pieces of evidence because you couldn't see all the angles of a certain object, door, whatever. I especially love how they so quickly dismiss all the "orbs" which are so obviously unfocused dust or bugs in camera light.
That being said, they have caught some pretty amazing stuff. The lighthouse was one of my favrorites with the shadow that was walking around the steps above them...looking of the railing. THAT stood the hair up on the back of my neck!
Here is the footage from the lighthouse.
http://www.youtube.com/watch?v=r-ZOBMrREJ0