A parcel setting that would derender all objects and avatars outside of the parcel boundary.
I believe this setting would be welcomed by many particularly on mainland parcels. It would be entirely optional to use but would make mainland parcels a more viable option for every resident.
I also believe a side effect of a setting like this would be to "clean up" mainland in general, reduce the use of ugly privacy screens, inappropriate skyboxes as ground level etc as the need for them would be lessened.
This setting would also improve performance within parcel boundaries due to lower render load and not require residents to manually adjust draw distance to improve performance.
This setting would be entirely optional and disabled by default.