I don't think the devs have access to the players' world files, so I don't think they can steal our builds to use as ruins.
But I would also like to see this, big usable ruins (for a home). The current ones are barely a campsite.

I currently clear them kind of like the terminator.. Ive taken down buildings with archers at the top because the stairs were blocked or missing. If they were useful, would have to have a better strategy.