This feature is already here as if you enter a low level zone with high level character you are scaled down. It does not split the playerbase, in fact it allows for more player interactions. There is no extra reward or punishment. What I'm asking for, and what clearly some people would like to see also, is an extension of that system. You would switch it on, which would adjust how your character, no one elses, is iteracting with the world. Anyway just food for thought.