I didn't notice a thread that concerned this topic, and I even have an old, very old ticket in on the matter that has yet to be answered.
Among various additions to plot permissions ideas that have already been submitted, (saw some nice ones in the Guild Maintenance Thread), there needs to be a fix for people with more than one alt.
Whether you have one or 10 subscriptions...I find it extremely frustrating and ridiculous that in order for my alts to access any of my plots...they either have to be in the same guild, or I have to use a Friends list which effectively closes off the shops/vault to other players.
I have 6 alts...any one of them should be able to access any structure on any other alt's plot. This was a bigger problem when I had only 1 account, 1 subscription, 1 plot (with shops for all), but 4 alts.
Anyways...a bit jumbled, but I think one can get the point I am trying to make.
Thanks