Hope thems be little bits, little itsy bitsy bits...............Just saying :)
Lol, yeah... likely just dust and small bits; a time to enjoy increased meteorites, like that green one you saw a while back! ;)
Anybody now how mulitple pieces will act when ISON whips around the sun? Doesn’t this greatly increase the odds of impact?
There could be an extremely slight possibility we could get showered with some debris on exit. The breakup would have to be violent enough that pieces would be launched with enough velocity (thousands of mile per hour) on a highly unlikely earth intercepting trajectory, to cover about 30 million miles in about 30 days or so. Those would be the most dangerous though. Individual debris would be much larger than anything we would likely encounter in the tail debris (unless there are trailing elements) and moving much faster, about 250,000 mph! :-)