I suspect that there's a risk of psychological harm when people are exposed to shadow banning. Having to constantly ask yourself "Am I real? Can other people see me?" is not healthy or normal behavior, but after being shadowbanned on a particular site you start having to do it constantly.
"just" be paranoid? A health person's reaction to a weak response is probably to assume, with some humility, that others didn't appreciate their comment so much. We're talking here about how the social media platform _ought to behave._
