In case you were still wondering
"Open borders" really only benefit the immigrants and their patrons. The overwhelming effects are to aggrandize the State, drive up the costs for a middle-class lifestyle, erode trust and social capital, burden the infrastructure, reduce wages, and crowd out greenspace.
Any naive fools still out there yammering about freedom and trillion dollar bills on the sidewalk, you didn't get the memo from Tom Friedman and Tyler Cowen. (Via iSteve.)