In light of the addition of pages for several places which have only been referenced but never appeared in DA, would not a page for a list of off screen places be appropriate to compliment the list of minor off screen characters? The tradition has been that a character or place must actually appear in order to get a page, however it is not, as far as I can see, official policy.
Thus, so as to not discourage anyone's contributions, might not a better place for them be a page dedicated to these place references?