Time Australia fined India for littering. NASA paid a fine when Skylab crashed in the outback years ago.
https://www.mentalfloss.com/article/70708/nasas-unpaid-400-l...
The idea is that an organisation, no matter how large, doesn’t get to ignore the law.
Alas nasa didn’t even pay the fine, probably some form of legal reason
https://www.mentalfloss.com/article/70708/nasas-unpaid-400-l...
It’s not likely, but debris may land on top of humans, and may be large and not only physically, but also chemically dangerous.
As to that fine, https://en.wikipedia.org/wiki/Outer_Space_Treaty doesn’t mention that, but does say:
“States shall be liable for damage caused by their space objects”