Adam,
Sorry, went all stupid and didn't catch the ref to the other thread. I'll throw a comment in over there later, though I probably don't have anything real intellegent to say about that situation (I know, I know, never stopped me before)
Your comment about idological vs. realistic makes me think of a point about this topic.
I sort of think that political correctness and it's apparent polar opposite, stereotyping, have a lot in common. They are both usefull in moderation, and potentially deadly when taken to extremes. Stereotyping is an important skill, we receive a lot of information, and we can't spend all our time processing it, so we put it in little bins. It was a survival skill when we were hanging out in trees, being saber tooth tiger bait. You needed to put something into the bad bin without much thought if you wanted to stay alive. Same thing today, if I'm walking down the street, I don't have time to get to know everybody personally, so they go into a bin, yuppie, gangbanger, old fart in my way, etc etc. And taken to extreme, it makes you stupid, because you put people in the wrong bin. I think political correctness has a good heart, in that it wants to make people think about how what they say and do affects social relationships, and effective social realtionships is a survival skill. However, taken to extreme and saying that all discourse about differences, or banning anything the could possibly be conceived as hurtfull is just as dangourous and bad as overdoing the stereotyping.
How this relates in my mind to the screening stuff, is that just targeting people who appear to be Arabs (which would probably sweep up a lot of non Muslims, like Hindu's or Christians for that matter) would be counter productive. That's just my opinion, which of course is correct
And I would get real nervous if there was a religion checkbox, since I would get real twitchy with Ashcroft in the loop when I check the Atheist box. Probably get my citizenship revoked.