Originally Posted by
Gaidax
It is there for people who want to participate, most will have it off. I, personally, will mostly have it off, because I don't PvP in WoW and don't care about measly bonuses that don't matter.
Then I will quickly get fed Mythic Raiding stuff and turn it on, because I will be able to win most of the encounters purely out-gearing the opposition on top of warlocks being generally good duelists. Unfair advantage? Yeah, that's what WPvP and duels were always about. If you want some super fair show of skill - you have arenas.