ColonelHardisson
What? Me Worry?
Which is unsurprising, given that the theory is one that hasn't gotten much attention. The Earth loses tons of material daily by way of the atmosphere bleeding off into space; the "sweeping up" of material from space probably doesn't much outpace this loss (I'm sure NASA has figures on this, but I don't know where to look). As eons go by, less and less material will be "swept up" since less and less of it will be there due to having been "swept up" in the past - that's why meteor and asteroid strikes were more common in the past than they are now, and why they'll be less common in the future.