And, as for immediately eliminating the people who know about this, there's
no need for that...
This kind of information doesn't spread that fast. Since, most people in the
US (and all over the West), from what I know, don't even read books - or
research about serious stuff, on the Internet.
You just need to put all the politically aware and active people on the
"list" (including those involved in such subversive movements as the "free
software" one), and send them to the FEMA internment camps, once a national
emergency is declared, and democracy is "suspended".
https://trisquel.info/en/forum/nsa-decryption-capabilities#comment-42221
For the people who don't read, there are those who have been screaming on the
radio, for years, warning people about this - http://www.infowars.com/. But,
let's see if they're able to stop it from becoming a reality...