Fair point. Actually it occurs to me that if we are only discussing the Problem of Evil, then "evil" can be defined fairly simply as "suffering." This, of course, mixes up moral evils, such as muggings and rapes, with natural evils, like diseases or hurricanes or earthquakes, and even actions that are usually considered justifiable, like killing in self-defense. However, the Problem of Evil is basically asking, "How could God let the world get so messed up?" and all of these things are part of the world being a mess, regardless of whether and how they fit into a moral framework.