They are actually a much worse threat to property rights than the migrants so many "conservatives" fear and hate (and use as justification for the property rights violators of the State).
And, most of the time they get away with it.
Shooting them for trespassing comes at a high cost. You might avoid being violated, or even murdered, at that moment, but stopping their immediate violation brings unending numbers of their brother gang members down on you. And disgusting copsuckers and other State worshipers will say you deserve it. Think of Cory Maye.
Well, trespassing applies to everyone. Badge or no badge, "papers" or none, "warrant" or none. If you trespass to conduct an inspection, you are still a trespasser. If you trespass to get where you want to go, you are still a trespasser. If you trespass to conduct an investigation, you are still a trespasser. Your "job" can't exempt you. And if you trespass with intent to commit acts of enforcement, I hope you die for it- preferably in such a way that your victim doesn't get blamed.