They come here because Americans give them money to come here. Take care of that, and you don't have to worry about enacting East Germany's border policies.
Like I said, “I think the fence remains a good idea but it certainly can’t work without concurrent changes in border policies and procedures.” But, having said that, I think the current state affairs warrants more of an east german approach. This is not a matter of a few thousand individuals, it’s a matter of millions of individuals which makes it an invasion. That warrants AP mines and snipers. America will never go for that though so get used to pressing 1 for English.