First, the government probably does not think these guys are any kind of a threat to them. I mean, so what if there are some people out walking around when no one knows they're there? It's like the thing about the tree falling in the forest with no one around.
It demonstrates that you have thoroughly explored the topic, and that you are aware of alternate points of view. By addressing or refuting the counterclaims logically, you gain credibility for your argument.
