Others I work with have told me that around 3:00am they hear voices in the morgue.
People who feel ordinary and or have nothing much to say on their own often like to have a story to tell and they even start believing them after they've told them long enough.
These stories are always fear based. If they're going to hang around after death, why is it that the spirits in these stories never do anything fun like go to the beach or to Disneyland? They always lurk about in dark lonely places....the same places they were afraid of when they were alive.
Billions of people have lived and died on this earth. It seems like there's been enough of them that have come and gone that we'd all have had at least one encounter with a lingering spirit, in our own lifetime.