If they built such a feature into GW then you probably would get loads of people in the 'safe zone'. And you'd have the Koreans camped out in the 'un-safe zone' just because they're better than us all.

I don't know if you've played GW, but once all your party is dead you respawn at a set Spawn point next to the portal between different areas. If you can loot, then you'd get people camped there looking for an easy kill.

Maybe (another maybe, always with the maybe's), if you wanted to make sure activity was equal in both 'worlds', you'd make it compulsory for those over a certain level to be in the free-for-all zone. Maybe lvl16 or 17 up.