Morphine drip would be humane. Of course. You know what we could do? We could get a bunch of disabled, brain damaged, and other useless eater types, and put them in a shed. Then we close the doors, and put the exhaust pipe from an internal combustion engine into the shed. All the Vegetables inside would just humanely and peacefully go to sleep. Just think how many people we could help at one time with this procedure?
Better yet, just rev up the gas chambers at Auschwitz. Think how many could be taken care of that way. Very fast, very painless.