Don't be afraid of the dark

Do you believe in ghosts? I recall a few times being scared and feeling like I was being watched, only a few times I have thought I saw something that wasn't supposed to be there. At one of my old houses, you could just walk in the front door and something would feel out of place, like someone was watching you. The basement was the worst in my opinion , it was very scary from what I remembered, it always looked so scary, but it was unfinished so it might of had that effect haunted or not. When I was in my room I had a ceiling fan above my bed and it always looked like someone was sitting on it staring down on me. Now in my new house I haven't really seen anything strange accept for some silverware that had been placed on the table a bit funny over night. There were 4 forks and one knife, the four forks where pointing towards the middle of the table, in the middle of the table was the knife. I found it strange, so I looked it up and found no results. Any clue what this means? What are your opinions on ghosts? Or are they just demons in disguise ?