We need a clarification of "bug abusing" ruling... desperately

[Nordenwatch]

In the "Server Rules" thread posted, this is included:

- If you witness, discover or hear of an exploit it becomes your responsibility to report that exploit. Some exploits could include: Loot dropping improperly for large monetary gain, pathing exploit allowing you kill NPCs at ease, or a quest rewarding you experience and giving you back the quest item to turn it in over and over for experience. We ask for everyone’s cooperation in this matter. It is important for us to stomp out any issues as quickly as we can so that things stay legit.

The problem I find is that there is no definitive way to prove that something is an exploit or an intended part of the server.

My favourite example and the one I "abuse" the most personally is the Necromancer heal ability. I have read the bug thread forums and this has been revealed to be an exploit of sorts. Are we not allowed to use this because it is an "exploit"? Should we be reporting people who do?

What about the recent drama around the dropping of the Lockets of Escape? They were not supposed to be dropping and was obviously a bug that was exploited. Should people be punished for this?

Where do we draw the line? I don't want to be banned for using the necro heal that 90% of necros use on this server, but I think that the monopolization of the Locket of Escape drop is a clear example of exploiting a bug.