Also again, the corporations and governments(for certain levels of government like the members of the Five Eyes) can pierce this veil of anonymity, the people who have a lot to lose already are risking it by speaking.
Edit: this also isn’t a newly diagnosed phenomena, I remember seeing this satirical description of the behavior as a kid back when Web 2.0 and social media was starting to change the internet[1]
[1] https://www.penny-arcade.com/comic/2004/03/19/green-blackboa...