I have often thought that if cremation is not the chosen method of disposal, why not bury the stiffs vertically? It takes up less space, the grave could be dug in seconds using a large drill, and instead of a coffin a nice biodegradable cardboard tube could be used.
Personally I am going to be cremated, there are too many documented cases of coffin lids with bloody scratch marks on the inside for me to want to take even the most minuscule risk of death being wrongly diagnosed.
All I ask is that I be cremated and not be put on a shelf somewhere. Go spread my remains in a field, ocean, landfill, etc., I don't care where. Boxes in the ground and a headstone are a total waste of space. Think about it. 50 years, 150 years, 250 years after I'm dead what is the point of that? No thanks, the traditional burial is not a responsible choice IMHO.