> I don't think it's the same as shooting a trespasser, the theory for shooting trespassers is that they may directly pose a threat to your safety.

I really feel the need to drive this point home, for obvious reasons: there is no such theory. You CANNOT DO THIS. You cannot shoot a trespasser on your land, just because he is trespassing. There has to be something else involved like reasonable fear of imminent bodily injury. The threat cannot necessarily be implied from the mere fact that he is trespassing. (It's clearly a different case if the trespassing is happening in your field in broad daylight v. in your bedroom in the middle of the night.)