horse-pheathers:
1) If you want to get explosives onto a plane, shove them up your ass. Current screening tactics will do nothing to detect this provided you don't give yourself away through erratic behavior (which would just as likely have been detected at a pre-9/11 security screening anyway).
2) The no-fly list is easily circumvented.
3) The screenings create a bottleneck where often hundreds of people are concentrated; you don't even need to smuggle a bomb onto a plane, just detonate it at a crowded security checkpoint instead.
4) Airport employees are generally _not_ screened. If you for some reason don't feel like cramming your bomb up your ass, there's a possibility of getting one of your guys on the inside who can carry the bomb past the screening point for you. Even if employees _were_ screened, you can pretty much just toss your device over the fence where an employee on the inside can retrieve it and put it where it can be used.
5) By creating the illusion of security, it blunts the single best defense you have against a terrorist attack: the alertness of the general public.
6) TSA also makes us less secure by sucking up funding that could be put to much more effective use elsewhere in the "war on terror".
7) By getting people used to invasive searches and other erosions of their rights, the TSA does far more damage to the country than the terrorists could ever dream of doing. The worst they can do is kill people, while convincing the populace to give up their rights will kill everything our country stands for.
Fark the TSA, and fark the US Patriot Act. And fark the cowards that are willing to sell our freedoms for even the illusion of security.