You are a serious threat to the normal public. Im a sheriff and understand law pretty good. You must read the entire law. Im sick of you and this thread. READ THIS AND LEARN HOW TO COMPRHEND IN ENGLISH> Someone flying at your field does not warrent LETHAL FORCE. THis thread needs to be Trowen away. I hope the owner of has deleted. I hope you don't teach your kids this way.

Texas law (Section 9.41 of the Texas Penal Code) allows you to use "reasonable force" to protect your property. Reasonable force includes any force that is not potentially lethal. This would probably include physically blocking the trespasser's entry onto the land and perhaps even showing the trespasser that you have a gun and are prepared to use it if warranted.
Warranted means inement danger. Interpretation of the law has already been done and not for you to twist for wanting to shoot other Hobbyist.