PvP setting

Full PvP (Player vs. Player) refers to a condition where it is possible for a player-controlled character's hostile action to affect another player-controlled character. This condition comes into effect in the Single-player campaigns only in the "D&D hardcode rules" and "Very difficult" difficulty settings. In multiplayer, a server owner or DM can set Full PvP in some, all, or no areas.

Hostile Actions
PvP actions can be purposeful or accidental. For instance, only during Full PvP may a PC pickpocket an ally or collaterally damage an ally with an area of effect spell.