This idea is in regard to the constant questions regarding what can be or should be locked down inside a house. I think much of this debate could be solved simply with doors that lock such that only the owner / owner+keyholders can open them. This would allow you to partition a multi-room house into private / semi-private / public areas. In turn, this allows you to lock things into rooms that casual visitors can't access. Rather than having to fiddle with the permissions attributes of dozens of individual objects, just implement doors than lock and the problem is solved..