I’m on an iPhone, so including a link is difficult. Just google “Italy Romanians.” It would appear that Romanians are more prone to commit crime (presumably due to cultural differences) than native Italians. As a consequence, a relatively lax criminal justice system in Italy has lured a disproportionate number of criminals since Romania’s recent entry into the European Union in January. Another consequence of liberalizing migration is competition in punishment, I guess. I would think this wouldn’t be a problem for the US – our system isn’t exactly known for being lax. Then again, I don’t know how ours compares to, say, Mexico’s. If we had an arrangement with Mexico allowing citizens of each country to live and work freely in the other, would we face similar difficulties? A question to think about for those of us who would like to see freer movement of people between nations.