You're not considering foreign operations. If included, I bet the US would be at the forefront.

Luckily the censorship game in the US is strong, but not that strong. I read a book about propaganda written by someone who wrote it for the US in WW2, and he was able to explicitly state (a chapter or two in) that he only gave examples of axis propaganda in the book because his side's were classified, but to remember that everyone did the same things.

(he did leave for a footnote that for examples of pornographic propaganda one would have to visit archives at an address in Washington DC; guess that'd be the 1950's talking)

If the US is conducting psy-ops on social media against adversaries, wouldn't they use media companies popular in that country? And, if that were Twitter, wouldn't the language barrier still make it relatively harder for Twitter (a company staffed predominantly by English-speaking employees) to investigate?

Additionally, does it merit discriminating between offensive and defensive psy-ops? Might there, for example, be government-controled bots injecting wholesomememes content into the feeds of depressed government employees? Does Twitter have a different obligation in that context?

> wouldn't the language barrier still make it relatively harder for Twitter (a company staffed predominantly by English-speaking employees) to investigate

That doesn't seem to have stopped them from banning accounts posting in Chinese.

> government-controled bots injecting wholesomememes content into the feeds of depressed government employees

That would still be "coordinated inauthentic behavior".

There’s fake ones like the @antifa_us account that was run by a white nationalist organization. It was promoting violence against white neighborhoods and was amplified by the Trump campaign and conservative media.

It has been verified by reputable media that twitter handle @antifa_us was a fake antifa poster organized by white nationalist group Evropa ([1],[2]). It's impressive there has been so much false action that is immediately discovered during this time.

In the small towns around the Seattle area there have been multiple false claims of antifa planned attacks, leading to lots of people pulling out their guns. Here's one where someone visiting from out of town took pics of kids walking around and made wild accusations that they were 'outsiders' who were threatening - yet he was the outsider who was making up threats. [3]

1. https://www.nbcnews.com/tech/security/twitter-takes-down-was...

2. https://www.redstate.com/elizabeth-vaughn/2020/06/01/antifa_...

3. https://www.issaquahreporter.com/news/how-a-man-from-califor...