As the mother of a child who recently responded to the question, "What's your mommy's name?" by answering "Mommy," I doubt this questioning does much more than terrify the kid.
I am ALL for security-- even if that means long lines and hassling restrictions-- but this quote pretty much sums it up, "Certainly, Mikey’s date of birth, less than a month before 9/11, should prevent him from being mistaken as a terrorist."
I'm well aware that terrorists come in all ages, shapes, sizes, and nationalities; and that there are crazy horrible parents out there who use their children for unconscionable means, but can't they add a little note to the file? Something to the tune of, "Not wearing a SpongeBob t-shirt" or " Not the blonde kid we've been patting down since his first trip to Disney"?
A little common sense could go a long way here.