This was posted last month, The idea is interesting, but we don't even know what ISON will be like, or even if it will survive for us to see it. We can look back at Elenin which was the last "comet of the century" and how it was blasted to bits (apparently) by a solar flare. This video does give the latest track that was laid out, in this case showing Earth passing through the tail of the comet in December. Considering our weakened magnetosphere, passing through the comet's tail should be quite an adventure. Some are even predicting doom! (Not buying it :), but trouble, very possible. The latest info has the tail at roughly 50,000 miles across. That's a big debris field. And who knows what's in the debris...
