Regardless of religious aspects, this is an intriguing idea WorldWatcher....that ghosts occur due to lack of cremation.
My only problem with it is my own experience...
It's actually kind of funny really....
My wife's late husband died very young (in his 20's)...and he was my best friend at the time (no, this isn't the funny part)...
Anyhoo, years later, we hooked up, eventually married, etc., as there was always kind of a bond there. Well, we kept his ashes in a nice decorative
box in the upstairs hallway, until we found a proper urn...(and we didn't think much more on it)...
After a small amount of time, we had some ghostly phenomena happen in the hallway. Usually minor, like a shadow in the corner of your eye...phantom
footsteps coming down the stairs, etc. (yep, that's minor)... If anyone stayed the night and slept on the couch downstairs (from the hall), they got
a little freaked by what they described as light moaning, etc. (and it wasn't us in the bedroom, hehe..)... One time, a dark shape physically
manifested enough to freak out even one of my buds who (until then) had been a confirmed non-believer in such things... There were other happenings
too, but they were all spread out (one time, it mimicked the sound of the dogs coming down the stairs, when all of them were shut up in the
kitchen...that was freaky)....
In all this time though, we never even thought about the fact that we had human remains in the damn hallway!!!
We mentioned it to a friend
once, and he just off-handedly mentioned, "Hey, don't you actually have a dead guy in your hallway?"...
My wife and I looked at each other with big "DUH" faces... We got a nice urn very soon after that, and since then, we haven't experienced any of
the ghostly phenomena anymore.... (that's the funny part, that for years, this simple thought didn't even occur to us...)
So, my own experience has me doubting the theory, but it is an interesting one. Perhaps the amount of the body present relates to the strength of the
spirit's ability to manifest, etc.?