With the tournament daily A Worthy Weapon you've got to collect 4 Winter Hyacinths and go to the Drak'Mar lake on the other side of the map to offer them to the lady.
But if someone else has gathered the blade you can take the blade without grabbing the Hyacinths.
The blade does not despawn after grabbing it once so that's not the griefing part, but if you Shift+Loot (Just loot if you haven't got auto loot on) and don't loot it they can't get it.
Just keep the loot window open untill it despawns and they will be pissed.![]()