[quote=mdk]I'll smash my enemies with rocks like a civilized gentleman, thank you very much.
[/quote]

An homage to life before civilization. How ironic. xD

If you're attaching rockets to an asteroid and then sending it off to the enemy, I feel as though they could easily and well in advance blow the asteroid up before it became a problem. It seems much more feasible to project a much smaller projectile at much faster speeds (aka space guns) than to fly big rocks at the enemy.

Not to mention the fact that using the asteroids as such seems like a big waste of good minerals.