I find this case interesting. While it's far beyond acceptable or fair play even in good fun and trolling to do something like sending someone who suffers from epilepsy a gif known to trigger a seizure, it's being classed as stalking in this case. I'm curious to see the evidence and what precedent this sets, because it seems like a stretch to call it stalking from what I understand of this case, which is admittedly not too much.
A good side effect of this is that hopefully it prompts companies to provide better protections against this, because it's rather unique in terms of medical conditions interacting with technology and has a lot of potential to cause harm.
Maybe there are many other cases but they go under- / un-reported?