To all those people saying, "This isn't a free speech case, they were simply jailed for making death threats!", I say: "Not so fast..." Firstly, because they were not found guilty of committing the old offence of "threatening to kill or murder any Person"; and secondly, because the act that they were found guilty under does, very clearly, have implications for free speech
The critical thing which needs to be done is that parents, guardians, teachers and friends need to take more responsibility to protect individuals who are young (and vulnerable) to ensure that they do not receive any abuse. These people can act as the 'Watchdogs', but they must understand how the internet works...
If you receive a malicious phone call, would you demand that the phone company be banned? If you receive a malicious or threatening letter, would you demand that the postal service be shut down? The problem in cases like this isn't always the medium which is used, but the horrid and twisted people who carry out these disgusting acts.
The panic about these keyboard-tapping folk devils, this handful of very sad men who are said to pose an existential threat to the safety and self-esteem of the whole of womankind, conforms precisely to Cohen's definition of a moral panic. With one difference: the moral panic over trolls has even less substance.
Online abuse is a complex issue with no easy answer, but we can all take steps to rid the world of trolls. First, stop using the word, and get real. Be compassionate, caring, and kind towards each other. Let's all live by the The Golden Rule of Twitter - tweet others as you would like to be tweeted yourself.
Criticism is great and without it there'd be a lot less motivation for humans to push themselves and keep coming up with better films, better ways of farming, better cars and better air travel, but empty, meaningless remarks don't help anyone. And if the authors of such remarks are being honest, it doesn't help them either.