Judgement is called for. I believe security policies need very much to be discussed especially when failure is fully apparent. Full debate is essential to develop truly effective procedures. The new security regulations banning Swiss Army Knives, Leathermans and cutlery etc. are little more than a sop to the public to show that something has been done -- no matter how ineffectual. Next to follow as contraband will be metal-barelled pens and pencils and keys, all of which can inflict major, even fatal, injury.
Just what specific measures are adopted by individual operators are of course confidential. As far as El Al's security procedures are concerned, a good deal has been published in the newspapers over the years, some likely at El Al's behest to deter tha bad guys.