I think this "wall thing" has been tried at least twice in the history of the world without the desired results. First the "Great Wall" in China only slowed the invading forces but did not fully deter them. A more recent example was the wall that separated Germany which was famously "torn down". Find a solution to helping those who actually need and want to come to this great country and deal with the drugs and thugs on their own terms. Lets not confuse the two.