They could be, I've never seen or heard a ghost that I know of.
My friend who was staying in Boston for a while said the house he was staying at was haunted and late at night he would hear lots of really loud thumping and slamming of cupboards and other weird noses.
And he asked everyone else if they heard it too but they said it happens all the time.
Pretty crazy if you ask me.
I bet that has nothing to do with the topic, but meh.
