As human beings those trespassers ought to be afforded human rights. They ought not to be afforded the rights and privileges that are inherent to legal citizens beyond those basic human rights. That means you can't kick 'em, beat 'em up, or shoot them in the butt as they run away (except under some very special circumstances).

In California an initial trespass needs to be reported and the official (peace officer) should respond and inform the trespasser of their illegal act. A case number is generated. the typical scenario is that a mistake was made and it won't happen again. If second act occurs by the same person(s) then it is a criminal trespass and the law has various remedies for such actions.

The initial trespass may fall under the term criminal if criminal intent was involve or if subsequent felony (s) ensued. A person ALWAYS has the right to defend his life or the lives of other innocents in harm's way; with APPROPRIATE force.

Perhaps some legal beagle out there could educate me (us) on this point. I have always understood that a compound criminal act falls under the category of felony, that is, a misdemeanor committed to further the commission of a another crime or a higher crime elevates that act to a felony. The first illegal act was violating the borders of this country for reasons other than to escape political persecution or the accidents of an emergency such as an emergency landing of an international flight bound for some other country. Does anyone know if this is so?