What's a lot worse than triple strand concertina? Cholla cactus. I can breach wire barriers; I don't F with Cholla. It looks soft and brushy, like pine needles, but it will penetrate anything you'd be likely to wear, like leather boots. The needles come off in you with the slightest provocation.
Nasty, painful but reasonably good looking at a distance. It grows itself, doesn't need repair, and thrives on benign neglect in the arid border regions. Plant a belt of it along the border, and you'd need heavy equipment to open a gap in it.
Walmart paid a fine equal to about 15 minutes of their anuual revenue.
I'd like to see some of the farms who employ these people raided by INS and then prosecuted to the fullest extent of the law.
Couple that with your chola cactus idea, which I like very much by the way, and we could make a dent in the problem.
L
If it's that dangerous to handle, how do you go about planting or transplanting it?