Interesting point on just exactly what constitutes trespassing-I do not have no trespassing signs on my house yet if you enter without my permission then you are trespassing. Therefore why do I have to put a no trespassing sign on my property? I own it and you don't for what ever reason. Therefore I would consider going on somebody's property posted or not to be trespassing if I don't have permission. There is not a state in the union, including Texas that permits the deadly use of force in a trespassing case unless you can prove you are in danger! I have researched this and believe it to be true. In Smith versus State of Texas on appeal this was held up where an individual was found not guilty of using deadly force when an individual was shot on private property. The reason was that there was a reasonable history between the two parties and that fear of life and limb was reasonable based on that history.-best case scenario-fine them, lose the license for 5 years or so, and community service from my standpoint.