Hopefully this doesn't also mean someone could be walking along minding their own business when suddenly they're hit by an AOE from an enemy someone else was fighting because now all players can attack all enemies (unless it's a leve or behest monster). Sounds to me like if we can attack them at any time, that also means they can attack US at any time (like again, them using a big AOE attack that kills people running by), even if they're fighting someone else.