Repost of video from human trafficking summit. Spread it, awareness of this problem is still low (thanks to MSM).
https://www.youtube.com/watch?v=HoIdTW23MiE
I think he is just alluding to how easy it is for them to cross the border in the absence of a barrier.
Alternatively, when you hit the border at Tijuana, hang a right. When you get to the end of the wall, hang a left and welcome to the USA.