Airport security is definitely an illusion, since it presumably only deters the most casual would-be hijacker (and really, how many of those are there?). At least it's not as laughable as it has been in the past (I used to fly through Newark every couple of weeks when I was in high school, and it was stunning how many of the security personnel didn't even speak English), but IMO it is still primarily there to make us feel better, rather than to provide any real protection. El Al's security rules probably have a more realistic deterrent effect, but I don't think we Americans are prepared to accomodate that level of intrusiveness (not to mention that if all airlines had similar rules, it would be all but impossible for Arab nationals and Arab-Americans to reliably travel on commercial airliners).