#1 - Sept. 4, 2018, 5:27 p.m.
Blizzard Post
Recently, many players brought an alleged exploit to our attention. These reports purported a method involving manipulating raid status in order to repeatedly gain reputation and other rewards from World Quests. We quickly investigated and found no truth to these claims. However, in the course of that investigation, we uncovered a different exploit that could have a similar effect.

The actual bug could cause characters to get into a state where they could complete World Quests repeatedly, receiving full rewards each time.

After fixing the bug, we felt it necessary to take action against a very small number of players who used it extensively to their advantage. One of our core values is ‘Play Nice; Play Fair’, and we take seriously the responsibility to maintain a level playing field for all players. No one wants to see a player use an obviously unintended shortcut to progress far beyond all other players.

You'll find the Blizzard End User License Agreement here for reference.