Ironraven:
Just how long do you think a comet's tail is, anyways?

A simple google search produces:
http://spaceobs.org/en/2011/03/12/dlinna-xvosta-komety-elenina-uzhe-prevysila-900-000-km/

900000 KM, approx.

Your analogy is pretty uninformed, aside from being outright derisive. A shotgun blast would be more appropriate though still inaccurate.

I understand my post borders on the nonsensical, and that's fine. Yet we debate all manner of hypotheticals, including 'ridiculous' topics such as bioterrorism or nuclear warfare. Why not this? Moreover, let's be frank: mother/father nature is far more dangerous than any man-made disaster if it ever wakes up and really wants to be.