This is heartbreaking and I can't even imagine the trauma and scars these experiences leave behind, no wonder why a lot of people in the entertainment industry suffer from mental health issues. From what I've noticed, SM seems to be the worst company when it comes to feeding into fans' fantasies, so I'm not surprised.
Unfortunately nothing much will change until they'll tackle the root of the problem which is the entertainment companies. A lot of these sasaengs have ties within the companies or even work hand in hand with them but I don't think anyone is ready for this conversation.