Poor kid.
Segregating the kids with peanuts seems backwards, but I'm guessing that the school administrators think it's less traumatic for the peanut kids to sit together (since there is always likely to be more than one, and they can keep each other company) than the allergic kid to sit all by his lonesome every single day.
Also, like the "Pledge of Allegiance", I'm guessing the kids could give two twits about the issue, and the parents are the ones making the big stink.
Only in America, can this be a real problem.