Before the world can be attacked by space zombies they would have to get through our first line of defence - "Space debris :)" - when this happens our western earthlings can sit back and say "this was our calculated effort in protecting the earth " while we all watch the alien space crafts as they plummet helplessly into the earth due to damage from Space junk.
Can't have this as a movie plot though it would all be over within 5min.

Or, lots of them, that when full, fire small rockets to propel themselves into the atmosphere and burn up?

that will eventually drop it into an isolated spot that isn't an ocean. Then go in and pick up afterward.

And if we're lucky, the word on the location will get out and all kinds of wackos will assemble within the designated target zone, thnking they can dodge the big pieces!

Why do the NASA and other space cadets use rulers made in Japan?

fix your sarcasm detector.

NT2