Would it be possible to make it so that when one person in your party, weather in dungeons or in the field, gets aggro from a mob it shows up on everyone's enemy list?

I've seen tanks in dungeons keep running ahead when the healer gets aggro from a mob that was out of the way when the tank passed it until they see the healer taking damage. I myself even as a DPS sometimes don't see Boss adds on my enemy list until I've hit them once, and if you are focused on the boss and they spawn off screen you may never notice them till they or your party members are dead.