On the topic of red v white, AOE spells should set all mobs it hits as red. Ive come across several "leech party payment collectors" who purposely nuke other peoples targets to clear the area. Now if the mob has been AOE only 1 goes red, the targeted mob, the rest are unclaimed and therefore they can target the mobs. Ethical probably as much as charging people to leech. Nothing in SE stops them from doing this, even though they are taking exp from other players (see rules) because the mobs are white you all saying fair game.