Anyone have Moomba's Trainer?

[Moldran]

What's the sense in not selling vitality elixirs, I ask.

This question is irrelevant. Something is not a bug just because it does not make sense.

This hasn't been brought up 'til now, yet I think this could be considered a bug.

There are no facts that could support such a point of view.

Was it a bug or a feature that in Diablo I the area of effect of Flash was rather odd?

If you mean the fact that Flash deals different damage to different target locations, that clearly is a bug.
You are correct in saying that sometimes, one cannot easily decide wether something is a bug or not (I think CC damage may be such a case). But this is only the case with very few potential bugs. In most cases, and in all of your D1 examples except maybe fireball damage, the distinction is pretty clear.

I don't know anything about the game mechanics of D2, so I cannot comment on your other examples.

So - crying 'bug exploitation' doesn't help the cause at all as long it's not clear if it concerns a real bug or a feature. And even then, since the user plays a game he bought, and the developers were to stupid/ to lazy to correct a bug/ patch it, then why accuse him of cheating? He doesn't, in the very sense of doing only what's possible through original game code. No doubt it's very cheesy at times, but not IMO cheating.

This means you consider neither duping items nor god mode cheating in D1. Interesting.

The "using what the game code allows is not cheating" point of view is nonsense. Some games have deliberately built-in "cheat codes". Is using them not cheating ?