The way Dak was dropping hides was indeed an incentive for people to multi-box, because it rewarded those who had more than one representative attempt to loot. Thing is, if someone is paying the money for the added sub, and both characters take part, both should be allowed to loot. The second character is paid for with a subscription fee, just like everyone else in the group.
All that is beside the point. The point is, you're asking for an auto loot function, which would severly encourage and activly aid item farming. Not just of boss mobs, of anything. This Is A Bad Thing.