There should be a way to fix liftable objects in place so that they could be made publicly accessible without the worry someone will carry them away on a whim. Cement would be a way of doing this. Cement could be placed on the ground through the landscaping options (requiring the appropriate materials in inventory), leaving a tile of wet cement on the ground. After some time, the tile would become dry cement. Any objects on the tile at the time would become fixed in place. It should also be possible to destroy the cement (to make the object moveable again), but this should be non-trivial. The fixed object could still be destroyed, so impromptu walls made this way wouldn't be very practical.
It's important that something like this be implemented before the map reset so that one of the disincentives of providing public facilities is removed. This should help make the urban environment around first-spawn points more meaningful, and make things easier for newbies who don't have a village to join. It'd also make runestones more useful. It would also potentially give villages a thing to "politik" over (provided villages can't make their own first-spawn points).