@dyslexia,
Thats an interesting question.
I can understand the view of some people that they should, because swine flu is a problem.
But, on the other hand, you would then have to stop anyone with the flu, even the common seasonal flu, from boarding planes.
I read somewhere that more people die every year from the seasonal flu worldwide then have died from swine flu.
Yes, with modern air travel, viruses can be spread around the world in just a few hours and that is a potential problem.
I really dont know the answer, and I really dont think there is a good answer to the question.
And if they are simply "suspected", what legal reason is there to stop them?
And how do you know they are "suspected"?
Is there going to be a "watch list" at every airport worldwide with every persons name on it that MIGHT have the flu?