Uneeded damages? The most casulties from the atomic bombs dropped on Hiroshima and Nagasaki were from the radiation that ensued afterwards. Nuclear means radiation damage. No matter how small the bomb, no matter how contained, there will be radiation damage. And that,my friend,is uneeded damage.
No, I say we let them try to launch, and watch it. If it comes to the west side of the Pond, light it up. If it heads harmlessly into the ocean, or self-destructs on the eastern side, then we let it go. If it does come west, don't start war, just shoot it down, tell them to not do it again, if we see any other military activity even remotely against the United States, then we light THEM up.