I just had a daymare. I am flying direct from San Fran to Dublin in a few weeks. What's the odds that somebody on this forum will be sitting at the pointy end - as in the very pointy bit behind the window. Made me shiver.
The chances are very low, but the fact that it is even a possibility is enough to give pause for concern.
On the other hand there is a counter-possibility that any high-altitude missiles launchers that threaten your flight may be manned by tossers (probably Att) and will therefore miss by a country mile.