That sounds extreme, but does indeed play into the stereotype of a Texas rancher. I'm in Canada, and if you shoot someone on your land who's not threatening you with a weapon - chances are you will go to jail because it's not reasonable force.
It is certainly a bit extreme. To be fair, it was clearly a warning shot fired a "safe" distance ahead of me. Most of the folks I've met in rural Texas aren't itching to shoot anyone and everyone, but they do value privacy to an extreme and will go to great lengths to protect what is (in their mind) theirs.
