I saw this show about the California Border Patrol and they had this truck with this night vision thing on it and guns mouted on top and in the show it showed the illegals running into these bushes and then you can see the tracer bullets and you can see the family's heat spread out all over the ground...that is not a good way to handle this, but if there was a humane way to tag them and if they come back find a way to deal with them.