electrified fence?

something really... because honestly.. im not racist or anything but those people are desperate they will do anything to cross...

they blocked off this road once and a good friend of my family was coming home...she comes to this road block...figures WTF? so she gets out of the car to remove the shits,and a bunch of mexicans rush out and rob her and steal her car... she was left in the middle of now where basically

EDIT: luckily an hour or so later people drove by and she waved them down, she found her car 3-4 days later stripped to the shell