> I may be wrong, but from what I've seen, the majority of "prevention of other people from speaking" is done to people who are not really constructive and muddy the water.

No one on this planet (China, Russia, North Korea, for example) surpresses speech they say is constructive input. When people get jailed for online speech in Russia, for example, it's almost always classified as distributing hate speech.

In 2018, Western Media even posted about "How a Social Media Post in Russia Can Land You in Jail[...]"[1]. Times have changed, I guess.

[1] https://www.newsweek.com/2018/10/19/how-social-media-post-ru...