PvP setting
From NWNWiki
The PvP setting of an area determines against whom a player character (PC) may take hostile actions. This setting also influences the reaction type (friendly, neutral, or hostile) between characters. The three settings available, in order from least to most restrictive, are Full PvP, Party PvP, and No PvP. An area's setting can be made more (but not less) restrictive by the difficulty setting and (in multiplayer) a server setting. The effective setting of the current area is reported to the player as a server message in the chat window upon entering an area.
[edit] Actions
Full PvP: When full PvP is in effect, a PC can take hostile actions against any other PC. This includes outright attacks, pick pocket attempts, and (presumably accidentally) affecting party members with harmful area of effect spells that do not specifically exclude friends (such as fireball). That is, the full range of Player versus Player actions are available. This setting is only available under the "D&D hardcode rules" and "very difficult" difficulty settings.
Party PvP: When party PvP is in effect, a PC can take hostile actions against any PC not in the same party. This is similar to the full PvP setting, but protects party members from hostile actions. This setting is only available under the "D&D hardcode rules" and "very difficult" difficulty settings.
No PvP: When no PvP is in effect, a PC cannot take hostile actions against any other PC.
[edit] Reactions
While the reaction type — friendly, neutral, or hostile — between most creatures is determined by faction and reputation, the reaction type between PCs is determined by the PvP setting and the like/dislike/in-party toggle found in the player list. This extends to reaction types with associates of PCs, with each associate sharing its master's reaction type. Furthermore a PC's own associates have the same reaction type to their master as would a PC in the same party.
Full PvP: Under the full PvP setting, two PCs can be hostile to each other if they are not in the same party and the players have used the toggle in the player list to indicate dislike of each other. All other PCs are considered neutral to each other (even if they are in the same party).
Party PvP: Under the party PvP setting, two PCs can be hostile to each other if they are not in the same party and the players have used the toggle in the player list to indicate dislike of each other. PCs in the same party are considered friendly. All other PCs are considered neutral to each other.
No PvP: Under the no PvP setting all PCs are considered friendly to each other.
