I’m not endorsing all of it, but this blog entry displays some original thinking on airport security:
Another way to limit risk is to provide approved carry-on luggage at the airport and sell reusable bags (like the green shopping bags) that could be turned in at departure and then reissued on arrival. Security personnel would do the transfer themselves as part of the hand search and the resulting bags would be assured to fit in the overhead space and assure hard limits on carry-on luggage were enforced. This seems vastly better than what Canada recently did by banning carry-on luggage outright.
Get used to this sort of thing: carry-on luggage - for some reason - is the scapegoat in all this.