It will be interesting to see where that goes in terms of codifying universal standards. "Existing on a list of 'terrorists' managed by certain nation states" is probably too politically biased. Case in point, the U.N. has passed many resolutions condemning Israel's aggression and violence against civilians. Also you could argue the U.S. drone assassination program induces terror in populations, just as China flying killer drones over San Francisco would to us. Even if they only meant to target, say, violent Neo-Nazis. The lack of fair trial, the collateral damage, the hum of the ever-present drones, the idea that you could be wiped out on the street at any moment.. it's terrifying.
If tech companies want to wade into this they would need to codify a standard that applies universally to all violent political actors. And, guess what, this comes up a lot in the U.N. and the militarily powerful nations tend to shy away from anything that might include what they do as "terrorism" or illegal. They tend to prefer blacklists they manage themselves over universal standards.