Correct, and that's precisely what was done here.
Not exactly the actions of "vigilantes."
Great job, patriots!
"You observe them, report them, and get out of the way," said Mike McGarry, a spokesman for the project".
Once they are reported what happens? Do they actually get sent back, because I can imagine if you traveled for miles and get stopped at a certain section of the border you might travel sideways for a while till you hit an empty spot and then cross over.