PA redirects here. This abbreviation may also be used for Premium Accounts, Paladin Armor and Platinum Amulets.
A person or guild that wants to take an advantage in the game for being stronger and/or more numerous. Usually this is done by threatening weaker players with the fact that the power abuser(s) will kill them or hunt them down (and then lure on or KS them) if they don't do what they say.
On Hardcore PvP worlds, conflict between players is not only expected but enforced, and thus the concept of "Power Abuse" doesn't apply very well.
As of Summer Update 2009 extreme power abuse is no longer considered a rule violation therefore any type of in-game oppression is permitted.