You will see from the history I tried a few different land use tags, however in all cases the property boundary is obstructed by the sand dunes when looking at it on both Openstreetmap.org and OSMAnd. In the local area the property owners are now asserting boundaries, with police getting called regularly, however fences cannot be constructed in sand dunes. Therefore a clear view of the property boundary is more important than an outline of the sand dune. I agree that we shouldn't map for the renderer, however in this specific case it's making best use of clumsy website programming by OSM.org.