Blocking, muting, or ignoring a handful of people may work. But when you have hundreds or thousands or more people harassing you, blocking them all isn't practical or sufficient. Get enough people mad at you and you'll end up being SWATted or doxxed (or turned in to deepfake porn). At some point the trolls start feeding each other. Next thing you know we end up with another gamergate (which started because some dude was mad at his ex).