For decades an OK landowner could not prevent a person from "looking for my livestock". A frequent trespasser our property used the excuse: "Looking for my livestock, i have the gun because of the wild hogs". Then i found the guys cattle on our place early in bow season. i fixed the cut fence, chased the cattle into the county road and locked my gate. End of problem.
The law was changed this year: Got to have landowner permission to "look for my livestock".