We took and kept any and all we found.
If a vehicle was on our land, they most always ran over an old rusty rake or 2 that was laying in the weeds on their way out.
When we first bought OUR farm for hunting, we tried the nice route. Far too many poachers had been accessing the land for too many years and thought they had the right to trespass.
We put an end to it quickly. It was our land bought for us and our friends.