I would never presume that people claiming sitings didn't really see anything. Sure they did. And there are many cases of multiple and crowd sitings. However, to assume that what was seen is some kind of disembodied spirit is just as presumptuous. There are several viable theories for most paranormal manifestations, including a few original theories I've come up with (and written about elsewhere).
Nope. Though you can never know if paranormal events are real or not. Though I am pretty skeptical about photos that allegedy contain 'real' ghosts.
I have never seen a ghost, but my last house was owned by an old women that passed away. I always swore (before I knew about the women had passed away) that I felt as though something was in my room and watching me sleep... It wasn't a scary experience, it was unnerving... Strange things happened like plugs behind cabinets being taken out the wall and cupboard doors opening, and the odd shaddow at the front door... I no longer live there though
I truly believe in these pics posted in this thread because I have experienced this. And they really exist. even you can see the haunted house series on discovery Channel and all the real incidents has been shown there.