Wrong... and first it should be noted that what some might call "trespass", others might call "license". Meter readers, public inspectors, utility company employees, surveyors, etc all have legal rights to enter upon property... so be sure you're following the Four Rules for Firearms Safety, most especially "Know your target (and what's behind it)".
(I've been shot at 3 times going onto land along my employers' utility easements.)
Secondly, and more importantly, our laws have very clearly noted that deadly force can NOT be used to defend property. "Imminent threat of lethal harm or grave bodily injury" (like rape) is the standard... and taking your TV does not count.
This nation was founded on a few ideals that even we conservatives seem to be leaving behind... "Better to let 10 guilty go free than to convict one innocent man"... and... "no mere possession is worth a man's life".
In other words: a polite society. How nice.