Helps the Argent Crusade heal the lands, then Helps Sylvanas replague it
Original post made me remember Might and Magic VII and Emerald Island, with some NPCs holding vital quest items and one nice wand. Though NPCs don't give it away for free - they want gold. Hack them! If you don't want to see your in-game reputation take a sink, you can always lure few dozens dragonflies from nearby forest unto poor village and let them slaughter everything. Tons of bonus gold + quest items are guaranteed.
WoW is quite kind in comparison
You HAVE to be some kind of psycho or another to go up against things like Deathwing and the Lich King. The people of Azeroth are just humoring us with these quests and rewards because they need us to go fight the big bads that tend to pop up every couple of years. Otherwise, they'd throw us in prison where we belong.
Not only are they psychos the ones in on moonguard are especially messed up!