We have a space junk problem. Fragments from very small (a millimeter) to much bigger (several meters) are whirling around overhead at fantastic speeds, threatening satellites and astronauts. Adding more could actually help.
There's a lot of space debris up there--and we're not talking moon dust: Smashed rocket fragments, dropped tools, flakes of paint even all orbit the planet at dangerous supersonic speeds. There's so much of this detritus, in fact, the USAF is planning a satellite to track it.