If the zombie sat in question is in a _very_ low orbit, this can be a reasonable approach, because the atmospheric drag can pull the pieces down faster than wou

If the zombie sat in question is in a _very_ low orbit, this can be a reasonable approach, because the atmospheric drag can pull the pieces down faster than would've occurred on an intact satellite. Otherwise, you risk just creating more high-v debris. At the extreme end of this, you could trigger the Kessler Syndrome (https://en.wikipedia.org/wiki/Kessler_syndrome https://en.wikipedia.org/wiki/Kessler_syndrome) and make orbit practically unusable.