Satellites would, I assume, burn up on re-enter if they happened to de-orbit. I'm more worried about them banging into one another and surrounding the Earth in

Satellites would, I assume, burn up on re-enter if they happened to de-orbit. I'm more worried about them banging into one another and surrounding the Earth in an impenetrable debris field that makes future space exploration/travel nearly impossible - IMO that would be a death sentence for all of us.