Gerefan,
I don't know how this became a passport stamp discussion. But, for years the US did not stamp, post 9/11 they did. now they scan your passport and don't stamp it - they stamp the customs form. Again Europe stamped for years then traveling intra EU you did not even see immigration . Whether the EU is now stamping I don't know or Frankly care as the point of my story was that a black person behind me was refused.