One of our properties was over run with trespassers in spite of its being posted. All our neighbors there also had trespass problems. The primary violators were a hog hunting "ranch" that owned little land and a hunting club that had 1,200 acres leased on the other side of the road. Ran numerous trespassers off my place including a lawyer and an OK City cop.
One day a new Dodge diesel pickup burned up while the driver and his friends trespassed on the place closest to mine. The landowner said the catalytic converter must have caught the tall grass on fire.