That’s a solid idea. Never heard that before. And it really seems like it would solve an otherwise extremely difficult problem.

It would not discriminate though. Everything in that orbit would be taken down - debris and any functional satellites.

You should read the linked post. You can tune the particle size to affect only objects below a certain size.

If we assume there's some altitude that's so polluted by debris that we need to intervene, it might not have that many functional satellites left. Cleanup the orbit in 1 year might be something the world could agree to if the alternative is waiting 5 years for it to clear up by itself.