Read this : http://www.wired.com/news/columns/0,71642-0.html
I think that Bruce Schneier is entirely sensible here. On one hand, we should be informed and careful, but the hysteria must stop if we don't want to encourage more.
I flew 9/16/2001. I would do it again.
Not to be a conspiracy theorist, but if I were a leader with 34% approval ratings, and I needed some kind of invisible intractable enemy to frighten my people, and let me impose whatever restrictions I want. The hysteria might seem like a pretty good idea.