Your post reminded me of something I recently saw up here on FR. In case you missed it, take a look to see the “nice” debris field China created with one of their ASAT tests. Makes me wonder how stuff still survives up there without turning into swiss cheese.
http://celestrak.com/events/asat.asp
The reason it survives is that there is a whole lot of space in Space... lots more than you apparently believe there is.