Re: What is this about?
You have missed something. 'Stalking' IRL is a concept you might know; 'internet stalking' is doing that on the internet, using all the resources it offers to watch and follow your victim and to make her life, and the lives of people close to her, a misery. Not hard.
'Too much time on his hands' -- lots of people had idle hours. Not all of them decide to use devious means to keep tabs on someone who doesn't want any contact with him. He was doing stuff of note: he was harassing her, harassing the people close to her, trying to libel her and trash her reputation. He wasn't leaving her alone when she wanted him to leaver her alone.
Again, not hard to understand.