Although we all despise trespassers and other thieves, be careful about "self help" or the legendary "citizens arrest". I read a story about some King Ranch cowboys catching some deer poachers, throwing down on them, taking their guns, and marching them to the game warden. Given the size of the legendary King Ranch, I expect it was a long walk. In the end, the poachers sued the King Ranch and won. In Texas, only a licensed Peace Officer has the right to detain someone against their will. I have discussed the matter with my local Game Warden who told me to call him if I had any trespassers. I expect they would be gone before he got there. Of course, theres also the case where one of my brothers friends in South Dakota found a poachers pickup on his land. The pickup must have an electrical problem because it somehow caught on fire. The landowner called the law and claimed that the poachers pickup had caught on fire and destroyed some of his pasture land.