I liked your first idea better. That one doesn't involve introducing invasive species that may or may not do well in the climate. You should have went with something like land mines. Also, something I find interesting about the whole topic is the fact that there are apparently "sanctuary cities" in the U.S. Because in Article 4 Section 4 of the Constitution, speaking of the states it clearly states, "and shall protect each of them against invasion;" That law is Federal Authority. Didn't we fight a Civil War over who had ultimate authority? The Federal Government vs Stares Rights? And didn't the side that backed Federal Authority win? With that being the case, how in the hell in any court can any part of this country declare itself a sanctuary for illegal invaders!!! Obviously, our court system is a fucking joke!