Or don't steal them at all? I wasn't aware that rock theft was a big problem...

What they are referring to, of course, are the rocks forming the waist-high fences areound the property.
The ironic thing of this is that the fences were constructed of these rocks because they lined the fields.
They were considered irritants at least - now they are an asset.

No PP on this shot at all. Some sharpening on the raw image through Bibble, but that's it.
Have I said how much I love the 17-40?