i have to say that my experiences with parties are rather interesting. over the last 6 months, over a dozen of my friends in the dorm picked up WoW, and the last month or two, they even had their own guild. if something like the "rolling on shit you don't need" issue came up, the other members of the party from the guild would go to that person's room and threaten their health (not horribly, but a good "you ever do that again, i'll beat your ass" mean's a WHOLE lot more in person
). it actually made their guild rather sought-after to party with as time went by, as the rules established in the dorm went for ALL guild members.
of course, there were bad times as well. i.e., the time my friend John (a sophomore) was taking a lower level party through SM. the pali in the group, Kevin (a freshman), kept pulling/getting aggroed by 3-4 of the NPCs at once, making it much tougher to rush the party through as they wasted time dying/resing members. John starts to power trip, and tells Kevin to sit the fuck still. So for the following three engagements, Kevin would let John pull, then go dance in the middle of the NPCs during the battle. That argument lasted for 2 days