Aslo, my question is. Can it be possible to stop the lodaing of the placeables upon knocking on a door? Now this would pause a problem for those free portals out there, but then again maybe a new option could be put on a door to manually load an area, the same way you did with the keys?
Y If that person does own a house, those placeables only appear if someone knocks on the door to his/her house or if someone who has a key uses that key inside the house itself.