For what it is worth, on Tuesday coming through immigration in Charlotte, they had a guy submit his fingerprints through the device right at passport control because he couldn't understand english well enough, and they put another guy in a booth to test for explosives and told him they would let him out if he passed. He looked muslim and had odd braces on his feet. I heard the inspector guy say something like "oh, sh**" when they called him out to do the test.
The security I went through in the foreign airport was just going through the motions, and to be sure they were doing some subvert profiling because I didn't seem to concern them. White guys with a southern accent apparently don't fit the profile. It must be hard to fake. It looks to me like people trying to get a paycheck who want to do a good job but have an impossible task and possible poor management. It is the chance someone takes.
The bomber on the plane from Amsterdam to Detroit doesn't necessarily look a radical muslim from his picture to me.
The people who work in the airport have some leeway in what they do. Give some people some leeway and the profiling comes in automatically. They are already doing profiling.
Another reason for not flying would be the swine flu. My flights gave me something.