Comment Re:Only thing a better monitoring system would do. (Score 1) 453
That's not exactly true. If you convert the rock into little pieces via application of kinetic energy the impact will be spread out over time and distance. The energy release will be absorbed by more air and re-radiation to space will transport a significant amount as well.
The dust would have to be moving at a significant fraction of the speed of light in order to achieve a toaster oven effect on the ground.
Of course, there's the possibility of a nuclear winter type effect...