I could be wrong, but last I heard, they don't use the scanners the US is demanding we use. In any case, they are more discriminatory rather than being random. Randomness has the appearance of being fair in our PC world, it may act as a bit of a deterance, but not very effective for detection.
I wish they would get over this trying to be fair all the time, I see nothing wrong with a little racial profiling. These terrorists are not 6 foot+ blond Nordic people, they for the most part are of Black, Arab Mid-Eastern decent. Those are the ones who should be watched a little more carefully for now. Isreal does most everything with profiling and physical searches, and yes it works.