Lasers and Vampires

Space junk is an increasing problem for an orbital presence. Here's a proposal to use ground-based lasers to clear the skies (how long before somebody screams about dual-use...what clears junk can also clear enemy satellites!). Could something like this eventually lead to a laser launch system?

And...with all that (expensive) junk orbiting the Earth, how about using them as a source of parts (of course we can also put the paranoid spin, as above, on this...what can harvest a dead satellite can also attack a live enemy satellite!).