A Quick Thought About Spirits

Ok, so I shared this once with a friend, and she thought it was pretty interesting, so I thought I share it here.  Ok, so I was thinking, since I believe in God, well I've been having doubts lately but I'm still leaning toward believing.  Anyway, if there's Heaven, hell, Purgatory,  What happens to all the earth bound spirits that people keep claiming they've seen.  You know the people on shows like, A Haunting, The Haunted, etc.  (if they're telling the truth that is)  What if being earth bound as a spirit is purgatory? It's just something I came up with once and I've been wondering...