Oh please. Some fool with a short bladed knife does not put the full plane in danger. Quite a few passengers will take him down. We make light of the TSA because of the huge amount of money spent on the system that would be better spent on intelligence agencies, international co-operation, AND IMPROVING TSA internal workings (data bases etc.)

Every step up in screening that TSA make only requires terrorists to step up the level of assault. Once TSA makes it extremely difficult the terrorists will focus on TSA inspection lines and when that is restricted they will switch to commuter trains, buses etc. So I hold my tongue when being subjected to such nonsense and look forward to the day when we become 'land of the brave' again and get real.
Stick a sharpened ball point pen into someones kidney or liver and you will easily take a life. But really what do you do then to bring the flyers under control...show them you have a six pack of BIC pens or maybe you will pull that frightening sharpened blade out of your belt. Really....TSA must think they are dealing with Wylie Coyote.
That is why some of us frequent flyers resent the programs.