Ya... PROFILING.That won't catch the sophisticated terrorists, who are the dangerous ones.Muslim? Middle-Eastern? 17-44? Male?
DING! DING! DING!
Even presuming we're talking about Muslinms, how tough would it be to take a black, Asian, Bosnian, or half Russian (European looking) 25 year old male and give him false credentials? If they could train him to speak with an American accent, he could even be given fake American credentials. Dress him in "business casual" clothes and you'll get past any "profile".
-Eric