The Huffington Post has stopped accepting anonymous comments. It's a start. So-called trolls who use comments sections to espouse negative views or to threaten or foment discord will always find ways to keep fanning the flames of disinformation.
The internet turned anonymity into a new norm. People became accustomed to communicating with unidentified strangers. However, these were a new type of human, a type whose moral agency was eliminated by anonymity.