Education is generally cheaper than prosecution
If there was more of a focus on teaching kids two specific things - 1) The world doesn't begin and end with social media - insults can be ignored; and 2) if its not something you would be willing to say to someone's face, then you shouldn't be posting it online.
Teach kids those two things, and the level of unpleasantness on the internet might just reduce a fraction. Admittedly, it will take a while, as all of the turds currently infecting the internet will still be around and there doesn't seem to be a way to flush them off yet.
Even though this piece of CPS guidance is overly broad, poorly written, and my god, that part about civil servants getting more protection then regular people is insane, but really the general sentiment that its time to actual start prosecuting some of the more disgusting denizens of the net is not necessarily a bad thing.
Still prevention is better than a cure, so hopefully the next generation can get some education about how not to be a complete twat on the internet, and then maybe we can all enjoy the internet in the future without the trolls...