My opinion is, that such "story" is a bunch of bullsh**
My experiences are, that things like this say about Czechoslovakian wolfdogs always people, who never cared about proper socialisation of the dog, educating and training the dog. They just think they buy the dog and keep it at home and everything will be fine!
Very often these people also call themselves breeders, but in fact, they are "puppy factories" who keep the adult dogs in kennels and cages all their lives and use them only for breeding purposes.
Very often breeders do not care to who they sell their puppy, which results with many owners, that have no experience with normal dogs or animals whatsoever, and they just buy a wolfdog! Troubles are then not too far, of course.
I am really sick of hearing all these ugly rumours all the time.
CSW´s are not exactly the easiest dog breed, but definately they are not more dangerous than any other breed of the same size. Neither they are unpredictable, extremely shy or aggressive. They do tend to bound on one person and that is usually the one they consider to be the super-alpha. But a normal well behaved wolfdog understands he´s the last in the family´s hierarchy and will (and should) listen to everyone in the family. And of course, no wolfdog will suicide because he lost temporarily (or even for good) his master. Yes, the dog might howl few days, might be sad, might not eat. But definatelly will live and handle the situation.
Please do not listen to people like the one you quoted. Use your own senses, read about the breed, talk to people, that work with their dogs, that actually do something with them. It will give you much better view on the breed.