I'm aware not all the villains weren't killed. That's why I said "largely contain".
I've never found a "List of the Deceased" or a deceased category to be useful. At this time, we are also trying to clean up the categories as there are multiple of the same ones, but with different casing or spelling (o vs ou). I may later on post a poll asking users if they would feel a deceased category is more helpful than not having one.