Snapedom

I'm not saying that there is a definitive explanation about what qualifies as Dark Magic. I'm saying that the Dark Magic spells that we do see only injure or kill their victims. That seems to be their purpose. So for me it seems quite reasonable to say that Dark Magic causes harm/death to the victim, hence the term Dark. Why do you think the spells are termed Dark? I don't think any Dark Magic spell is created to be done at parties as entertainment. They are created to be weapons and they are not nice. But then I don't think guns are nice either and I'm leery of knives. A very peaceful person, me, myself and I.

PS, I think that Memory Charm that Lockhart used and it backfired on him. I would term that as Dark. Anything that would wipe out a human being's memory as permanently as that did, is certainly Dark in my book.