According to all the documents published so far, the NSA does none of these except monitoring public social media posts.
That is extra strange since I've never used the USB port on my TV, and the TV has been installed rather high on a wall behind my desk since the day it arrived so it would be nearly impossible for my wife or small children to get at the USB port, let alone plug in a valid source... unless it was being used as an exploit by some software in the TV.
I'm not suggesting that is what is happening, however, it is suspicious as hell.
From the first paragraph of the article linked here:
>The U.S. National Security Agency collected 534 million records of phone calls and text messages of Americans last year, more than triple gathered in 2016, a U.S. intelligence agency report released on Friday said.