My apologies for not doing a proper quote below and for neglecting the name of the poster, but I wanted to read the entire thread (whew!) and did not want to lose my place. I found this on point (emphasis mine):

"Doesn't it strike anyone else as a bit wierd, and a bit disturbing, that all one needs to do in order to distract and tie up a significant part of the security and law enforcement resource at an airport is walk around and snap a few photos? Are these morons really so stupid/naïve as to believe that some terrorists have already figured out that all you need in order to neutralise an airport's entire security resource is 2 - 3 guys with cameras? ..."