I wish there would be some military action. That's something I would like to participate in. Not a full invasion of Mexico mind you, just an outburst to show that we still can wipe them out of we want to. Like a snake striking after being prodded too many times, we need to unleash hell if only for a few days, and then have a cease fire just so they know who is boss.
Then build the wall, with landmines.
I think an ultra hard line stance wouldn't even need to last permanently. Change our border policy to an crosser on foot will be shot, no questions asked, and any vehicles will meet an AT4 or Hellfire, and I bet border traffic would decline to a trickle after only a short while. So many people cross be cause it's so easy and they know we won't do anything. If we really start blowing the up without hesitation, I thinkit will have a cumulative effect on all would be crossers.