In order to reduce lag in the many popular areas due to unattended characters how about creating some "Auto-Disconnect Areas". These areas would be located near currently congested areas (Port Jeuno near Abyssea NPCs, entrance to all MH, near all Cavernous Maws, any other area of concern) and the floor/ground would be of a different color than the surrounding one. Any character standing there would automatically be Disconnected from play after 60 minutes if not moving (same amount of time as using the maximum setting in the Global Settings menu).

This would surely help remove the tons of players too lazy to park their characters in their MH when not playing.