I heard that it is.. nasty bugger too.. sucks the eyeballs right out of your head!
Seriously, have it checked out. My house in Brooklyn had a black cat ghost that never really bothered anyone.. it did interact with us on occaision.
There was also a man, a farmer that would smoke a pipe in the basement. My wife had seen him when she was growing up, along with other family members that could confirm.
Neither of these "ghosts" bothered anyone, just walked around a bit and did their thing.
I have personal experience in this, not this house, so all I can say is, it may be.