It's the critters that worry me. They can't climb walls. Humans can and they do. What are the deer supposed to do without passports or green cards?
Driving through Brownsville on my way back from the Rio Grande, I stopped to take some tintypes of The Wall. The tires are dragged behind Border Patrol SUVs to wipe out old footprints so they can detect when new folks have crossed over the wall.
Technically I don't think I was supposed to be on this road, but no one told me to leave, even when the Border Patrol stopped to ask what I was doing.
I would like to go back down there are make portraits in this setting. Maybe this March.