Used to be best way to do leves was to fail them

[Murugan]

training through 80% of the mobs to get to the bosses in the first day or 2 of a dungeons release isnt normal by any games standard that I know of. Give me 3 examples of when this normal situation occured in a popular MMO. Remember im talking 24-48 hours of release of the current "end game" content.

You sure got me there!

.... unless you count:

Vanguard: APW (great dungeon)
EQ2 just about every other raid
FFXI (lol really?)
EQ1: Plane of Fear where there was really no other way to do it, Plane of Hate (before and after revamps), Chardok, in GoD expansion, and loads of other training through various zones to shorten raid times
WoW: trash there, which might be the only MMO you are familiar (since you asked such a silly question), dies so quick and is so mind numbingly simple to zombie mode I know maybe some like you don't bother but I sure did it quite a bit.
LotRO: Never bothered raiding
Aion: lol again

That was exhausting to think of 3 whole examples!

The only way you can prevent players from doing this is:

1. Mobs never leash but even then if you look at the examples above (XI and EQ1) that didn't stop people.
2. You leave no safe place whatsoever to regroup.
3. You have no time limit, the dungeon itself is pitifully short, the mobs are easy as pie, and generally no one cares so they just kill all the stuff they don't particularly want drops from anyways.

All three of those would cause so much more rage from players than your pitiful complaint about Darkhold that you should just give up your argument now.