At last, the TSA is maybe coming to their senses. I won't believe it until I see it though. The problem with the TSA is they are trying to close the barn door after the horse has left. The possibility of any terrorist reenacting 9-11 is less than 10%. Why? Because we as passengers were always taught to cooperate with the terrorists until we landed in the Middle East, where one member of the passenger list would be singled out for death, then we would all be let go, and the terrorists released to become hailed as heroes in their hometowns.
The change actually began on 9-11. Remember Paul Beemer? He was the one who said "Let's roll" during the hijack over Pennsylvania. They already realized that cooperation was fatal, and weren't going to go along with them anymore.
How about the shoe bomber, he was stopped first by the passenger seated beside him. All of us are aware that the rules have changed. We are no longer going to acquiesce in these type of situations.
It reminds me of when the Red Army Faction was active in Germany. After each attack, we would go through enhanced security for about 6 months, then when we were fully relaxed, there would be another attack. The advantage was always with the terrorists.
If you wanted, I could list about a hundred ways to attack cities and other areas of concentrated people, but I won't because there is no reason to give an idea that did not exist in their minds to begin with. In our society, we are inherently vulnerable. We cannot stop attacks here at home from a determined enemy. What we need is an ability to develop intelligence about their activities and thus the ability to thwart them.
In the meantime, be sure to take off your shoes, and suffer the fact that you are next on the list to be inspected, even though you are just ahead of a guy wearing a Khaffiya.