Exclusion list for object clearing...

I have a parcel with 3500+ prims on it, most of these belong to one group (which owns the land) however there are close to 1000 prims that dont, swapping these over to the group that owns the land is not an option but I need to be able to clear the land of unwanted objects. I suggest an exclusion list that allows you to select groups as well as people to be excluded when the land is cleared of its objects. This would be a great feature and save me and no doubt a lot of other people a lot of hassle.