From my experience working with the geriatric terminally ill, most often the reason for cremation is financial.
I will say, as Deacon Jeff mentioned, the mantle is not ok, nor is spreading. At a funeral once I had a couple proudly tell me their mother loved the casinos so they took the ashes to Atlantic City and Las Vegas, poured some on top of their car and drove up and down the strip while they blew off. I learned later they got the idea from a movie.
I am seeing more people also wearing jewelry with a portion of the ashes of loved ones within; necklace, rings etc. This is pretty reminiscent of pagan ancestor worship.