it creates a chilling effect on dissent and discourse
What creates chilling effect on dissent and discourse is tyranny and political correctness. When Dissent is chanted down by the Mob crying "racism" or "Bigotry" or "sexist" or any number of other terms that are designed for ONE thing, to quell the voices of those opposed to the march towards tyranny. ONLY Approved voices need to speak, all others will be punished mercilessly.
Agreed. However, posting PII/PHI of private citizens should be illegal. Just as shouting "Fire" in a crowded theater is illegal. Because the social and personal cost is greater than any conceivable benefit.