What's worst about this is that this seems way out of proportion. He signed (and co-authored I believe) a petition arguing against NSA surveillance out of concern for its effects on democracy - a move that is absolutely in agreement with democratic values. Is there anyone who could argue that barring his entry to the US is justified? I don't like hyperbole but this is indeed truly worrying; I would expect it from Russia and China, certainly not from the former "shining city upon a hill whose beacon light guides freedom-loving people everywhere."
There is nothing out of proportion here compared to previous decades. There is nothing out of ordinary in denying visa from someone writes and works against the national interest of US.
Visas have been denied from communists, peace activists, greens, anti-apartheid activists and homosexuals in previous decades. Surveillance critics fit this group just fine.
