In a reprint of a Washington Post article (the Washington Post requires registration to read) the Seattle Times is carrying an article on the preference of terror organization to use simpler (or no) technology.
Some examples from the article include:
The preference for low-tech is primarily an issue of operational security. The greater the dependence on, and use of, complicated technologies, the greater the chance for detection or opportunity for disruption - a vulnerability is a vulnerability for victim and adversary alike.
"Overall, terrorist cells around the world have become noticeably more skilled at avoiding detection, European counterterrorism officials and analysts said in interviews. For instance, operatives now commonly use Skype and other Internet-telephone services, which are difficult to trace or bug.
At times, they have displayed a flair for creativity. Defendants convicted last April in a plot to blow up targets in London with fertilizer bombs communicated via chat rooms on Internet-pornography sites in an effort to throw investigators off their trail, according to testimony."
In fighting terror, think low-tech