Sure, but my understanding is that there are so many micrometeors already, they can't leave windows open to space for any extended period of time. There's alrea

Sure, but my understanding is that there are so many micrometeors already, they can't leave windows open to space for any extended period of time. There's already tiny particles flying around that they can't do a think about about. This implies that more small stuff shouldn't matter in the least, as they already have no choice but to have protection against this. That means, there is a size small enough that it's no longer an issue. For someone knowledgable, I think it's simple to determine a ratio of size/speed/material type to determine whether or not to shoot the object with a laser or some other method.