What you mean about polygraphs is not the important thing here. It is the idea that if you have read or written something the government does not like, you end

What you mean about polygraphs is not the important thing here. It is the idea that if you have read or written something the government does not like, you end up on a blacklist that bans you from many jobs. This is totalitarian ideology regardless of how democratic the US is otherwise. I find it quite scary, especially given that the authorities also have the means to more or less keep a complete list of what you read, at least if you read it or ordered it through the internet if they so desire.