I am really not sure what I think about ghosts. I generally consider myself to be a non-believer, as I am with deities and religion, but I can also admit that I really don't want to believe that spirits exist. Supernatural-themed horror movies and such freak me out a good deal, way more than slasher movies and blood and gore. Give me Saw over The Ring any day -- at least I'll be able to sleep at night.
That said, I have quite a few friends who definitely believe in the paranormal and who have had their own experiences with ghosts and spirits. One friend even works as a psychic and a healer; she gets paid to get rid of ghosts from peoples' haunted homes, and she has some pretty believable stories from her work.
Recently, my mom's friend has been having trouble with a ghost in her home. It keeps her daughter up at night, and they have seen some very strange things happening around the house. What they really need is a Paranormal Research Team to come in and evaluate their situation. Maybe they would see that they had nothing to fear -- and maybe the child in the house would be comfortable enough to move back into her own bedroom, instead of sleeping with her mom!