“NASA has the ability to drop the ISS into the Pacific Ocean any time they want to.”
I doubt that very much...
Not to mention it would really piss of the few allies we have left who have put billions of dollars into it themselves.
That said it does have limited mobility. It was repositioned for the launch of the Soyuz capsule yesterday. It could be nudged into a lower orbit that would speed decay but its pointless anyway because its an idiotic idea.
Why would you doubt that? NASA put it there and NASA maintains its orientation and stability. NASA has full control of every major operation and system aboard it. I doubt they would, but the ability is there.