I believe that the soul of a human can come back and haunt the phony people on earth that pretend to be friends but yet they are not. I call those people hypocrites. In my case those people will soon find out that it does happen as my days are numbered and I don’t believe they're numbered in years. But whenever my time is up, when I do go into the afterlife (which I had briefly already experienced a couple of years ago), that's when they will find out that the soul can come back and haunt them.
That kind of 'friend' is an enemy that will stab you in the back at the first opportunity that presents itself for them to do so. I have some friends that do believe of the soul coming back to haunt them so they will do favors for you but reluctantly and hate every bit of what they are doing for you because of their belief. They seem to forget that the more problems they give you the worse the haunting can be.