Space junk would come down in other countries, too. Even if there was a great conspiracy of "them" in the USA, there's plenty of others to report on it.

Reporting on something is rather late after it’s already hit its target, don’t you think?

The key to strategic usage of deorbiting is that the mass is already in position, and only needs to be properly wielded.

No amount of “investigation” or reporting would stop that from happening.

"they"