Region griefing
From NSwiki, the NationStates encyclopedia.
Griefing is defined as playing the game simply for the purposes of causing grief to others. It is also a term commonly, and more specifically, used to describe the practice of illegally ejecting all members of a region after invading it, or otherwise violating the rules of invasions. Because it is a very ambiguous term, "griefing" is open to numerous interpretations based on what event it is applied toward.
