Using estate tools we should be able to prevent a unattended (non-sat on objects) from entering our sim's. Right now similar controls are part of parcel control. but this has 3 issues. 1. If you deed the land to someone else they might decided that you are in the wrong and remove the setting not knowing that it puts the sim at risk. 2. I only want walls at sim crossing not at the parcel level. So that it would still be possible to move something across the sim but not cross into an other sim. 3. Estate managers can not access parcel level controls. Benefits include 1. Protecting major networks of sims. one sim might get attacked but damage would be restricted to a single sim instead of the whole network. 2. One would be able to avoid accidental Object escape into there sim as the object would not be able to cross the sim line. 3. Would still allow for gun use within the sim regardless of group title (Once you are in a sim your bullets will be able to stay in the sim instead of hitting parcel lines) 4. Vechicles would still work sense they are being sat on by an avatar. 5. This would Prevent Cross sim attacks where a griefer can sit on a sim with Lax/ absent security and still be able to attack an other sim without massive changes to settings. (Estate managers can only turn off scripts, collisions and physics and could not even at a parcel level restrict the attack.) Hopefully I did well with explaining my first feature request.