If there were such a function (llReturnObject) land-object management could be a whole lot more dynamic. Imagine:
* Land scanners that return object by people who are no longer around (rather than an annoying time interval)
* Rentable skyscrapers where object usage can be managed for both tenent A and tenent B in the condo directly above tenent A
* Scripted Object that can keep particular areas clear around them (within a 96 m radius?)
* Note, this would push the object management onto the SL users with the freedom to do what they want rather than having to go through LL everytime they need a new feature in the object management