It won't happen, but if globally we could agree to put a moratorium on large constellations in those orbits until we have more experience with constellations in the really low orbits, that would at least help and give us more time to learn. Without everyone agreeing though, someone else will just be like, MINE and fill it anyway.

Edit: like lets see what happens as starlink becomes even bigger and moves into 10s of thousands, and kupier appears etc before moving up higher.