What words trigger Echelon?

"There are the obvious phrases like "Kill the President" which caused two schoolboys from the UK to be quizzed by special branch, "anarchy", "echelon" :-), "nuclear", "assassinate". Then there are ones that are dodgy (cause they fit in with X-file type paranoia) like "Roswell", "Waco", "World Trade Center", "Soros" - after George Soros, "Whitewater"."
https://www.theregister.com/2001/05/31/what_are_those_words/

"For instance, Simon Davies, director of Privacy International, warns that the list of 1,700 suspicious "trigger words" will not outsmart the global surveillance system : "The Echelon system works on a very sophisticated system of word relationships, rather than strictly on keywords. Powerful artificial intelligence software is used to judge the relationship between words, and analyse strings of words." Davies advises protestors to send a whole series of original keyword transmissions through email, rather than relying on someone else's template."
http://www.bugbrother.com/echelon/spookwordsgenerator.html

"Just a few of the trigger words are:

bomb, gun(s), drug(s), explosive(s), police, FBI, NSA, BATF, Reno, Ruby Ridge, ammo, shoot, Waco, Oklahoma City, Randy Weaver, Koresh, Liberty, Constitution and Bill of Rights.

And that is just a start. Those last three really got me, though. The list of trigger words that was expropriated from the Menwith Hill ECHELON station in North Yorkshire England a few years ago was hundreds of words (phrases) long and those three were near the top of the list."
http://www.actionamerica.org/echelon/echelonthrt.html

"The U.S. government is making it known that it can [and does] sift through all the data packets on the internet, if need be, using Carnivore and Echelon, hoping to find some terrorist's malicious email in the process."
http://www.akdart.com/priv8.html

"The following is a list of 'trigger words' that could be interesting to the ECHELON-system scanning all messages floating around on the Internet (the NSA says that they don't scan, but that's what the NSA is supposed to say)."
http://www.anyothername.de/space/cp/19echln/trigger.html

"The computers at each station in the ECHELON network automatically search through the millions of messages intercepted for ones containing pre-programmed keywords. Keywords include all the names, localities, subjects, and so on that might be mentioned."
https://www.globalresearch.ca/echelon-exposing-the-global-surveillance-system/30532

These Are Supposedly The Words That Make The NSA Think You're A Terrorist
https://www.businessinsider.com.au/nsa-prism-keywords-for-domestic-spying-2013-6