Originally Posted by
Miles_Maelstrom
Griefing other players is the only option available to us. The monsters for light grinding are an extremely limited resource and there are so many players. So if you form a group and find all the monsters your group needs are currently occupied by other groups your only option are give up and quit playing or grief one of the groups until they do. The design of the instance anything takes hours so there is no waiting your turn, SE also failed to give us any mechanic involving laying claim.
SE may not have wanted players to grief other players, at least they say that. Their game design on the other hand leaves us no choice, it's on them.