They have undermined the barn at our flatland house to the point we have collapsed areas, they caused a leak in the pipes & screwed up the electric wires. Of course, as you mentioned, they are pretty good at destroying gardens & getting into things like our fig bush. I have no tolerance for them.
They have been trying for years to dig a den under our barn, concrete slab. One succeeded last year and I managed to see her (females are huge) dive into the hole when she saw me. I yelled to hubby get down there. They are very fast when running but she was under the barn. Hubby hopped on the atv with a 20 gauge and shot a few shots in the hole and pushed the sand back in after her. RIP.