If a player goes Hostile with a member of a party, all other members of the party will go Hostile with that player in return. If a player attempts to go Hostile to a fellow Party member, that player is simply dropped from the Party and becomes a regular Neutral. If you try to target a particular Neutral player, the true target instead shifts to a nearby monster, Hostile player, or simply the ground. You cannot directly harm a Neutral player. Neutral players may form a Party together.
Party members share equally in gold and experience points.
Certain skills, like Paladin Auras and Barbarian Warcries, apply to party members, too. You receive a message whenever players change their relationship settings with you. The sliding scale applies if the level difference is between 5 and 10. This is done so that a level 5 character running around with three level 20 characters isn't getting ridiculous amounts of experience for the higher level monsters which only his level 20 party members can destroy. When a party member picks up a stack of Gold, Gold is evenly divided among the members with any remainder going to the one who picks up the pile.