Properties can currently be set to one of four overarching permissions: Deny All, Allow All, Guild Only, or Friends Only. However, individual structures only have three settings: Deny All, Allow All, or Guild Only. Is there any technical reason individual structures can't have a Friends Only setting?
I know personally it'd solve all my lair use dilemmas, as I'd be able to Allow All for the plot-- opening up pawnbrokers and silos-- and then whitelist a couple friends to get at my precious storage, like lair rooms. Under the current system there's not really any way to both allow a small number of people (such as my alts) access to long-term storage for things like tech comps, AND leave my shiny shiny pawnbroker open to the public (which is why I built it). Which makes me sad.
Anywho, having griped about this to my friends a couple of times, I finally wondered "well why DON'T we have the option?" and now I'm curious. Friends list hogging the database resources? "It never occurred to us"? I must know!