If you study history, walls have always been a target for invaders and they usually find a way in. This one won't be any exception.
Absolutely disagree. Walls have worked for thousands of years to keep folks from passing thru... Of course a full military assualt would necessitate other defenses but pancho and jose would be unable to simply hoof it across and that is why it's a necessary part of the solution.
I'm with Boomer on this one. If you're out on your boat duck hunting and you accidentally blast a hole in the bottom with a 12ga, the first thing you do is try to plug the hole with something to slow it down first. Then try to bail it out. Without the wall, they just run across with nothing to slow them down. It might not stop all, but it'll stop the majority.
