Don't know where you're from, but if you did that in California you would find yourself behind bars. Threatening someone's life is a felony. And someone merely being on your property would never stand as a defense if you blew him away.
If I only have one wish in life it will be that the Government send Lon Horiuchi, the Ruby Ridge murderer, to my house to take my guns and that I am forewarned that he is coming..Justice will then be served for the Randy Weaver family.