When you are out hunting and you see someone global on same kind of mob you hunting, to easy see if he/she is on the same spot like you. Here is a possible solution for MA to implement. Perhaps more smart things can be added to this idea.
What's the goal? If you, like me, believe that the place doesn't matter and each mob has a planet-wide lootpool, then knowing where the globals happen is unnecessary. If you believe in local pools, you don't want the whole world to know where you're bathing in the loot