Look, it's extremely easy to stop them. A fence. Some caution tape. Calling the cops on them after they start digging. An inconveniently placed car. Removing the flags. Some fake DigSafe markers. A cease-and-desist. Snow fort. Vicious dog. Vicious dog with a gun. Singing telegram. Impromptu archery tournament. Overly curious moose. Claymores (the swords). Claymores (not the swords). Overgrown Roomba. Filming for Furious 11. Cometary fragment impact.