If you'd read TFA, you'd know that this case is where the trolls impersonated a woman, setting up a facebook profile with her name and photos on it - so that people who knew her IRL thought it was her profile. That profile painted her as a paedophile and drug dealer. They did this just for fun.
I'm pretty sure that identity theft and libel (or the equivalent definitions in other legal systems) are illegal just about everywhere; and can and should result in this content being "banned from being published", and the anonymity of the people doing it being stripped away.
This law could be over-broad, I don't know, but if you find the take-down the most disturbing part of this case, check your sense of proportion.