Oh, before I forget, they'd have to fight North through areas held by the drug cartels before they even got to the border. Those cartels probably wouldn't look too fondly on the elimination of clientele.
I am my own God. We are here to unlearn the teachings of the church, state, and our educational system.
We are here to drink beer. We are here to kill war. We are here to laugh at the odds and live our lives so well that Death will tremble to take us.