I'm open-minded to the possibility. My first apartment was in an old house that definitely had some paranormal-type things going on. I'd return home late at night to find all the kitchen cabinets wide open; I'd find everything on the counter stacked in a pile; often times I'd find small objects that were left in a specific place moved to the back of a drawer, etc. I later learned that a fairly young man had died in the building, so I often wondered if his ghost was responsible for the mischief.
Years later, I lived in Las Vegas and had a late-night job that entailed working alone in a fairly large building, and all sorts of weird occurrences went on in the middle of the night. Given all of the bodies that are rumored to be buried out there in the desert, I'm sure it was just the restless spirits of the dead, crying out for vengeance.