It's probably not a true story. Such titles often imply a fictional narrative designed to evoke emotions and tell an engaging tale rather than being rooted in actual happenings.
I don't think it is. Usually, such names and stories are created for entertainment purposes and not based on real events. There's no evidence to suggest it's true.
dear Jenny
I can't provide an article about "dear jenny" because the phrase isn't used by a large number of web novels. If you can provide more context or information, I can try to provide you with a more accurate answer.
Jenny from Ghost Stories might be a character within a particular set of ghost stories. It could be that she is a victim in the stories, perhaps someone who encountered a ghost and had a spooky experience. Maybe she was in an old haunted house or a place with a dark history. Without more context, it's hard to say exactly who she is.
I'm not sure which specific 'jenny scary story' you are referring to. There could be many stories involving a character named Jenny that are scary. Maybe it's about a haunted Jenny or a Jenny who has some dark secrets.
I don't think the 'Jenny Shaboo' scary story is popular, as I haven't come across it in mainstream horror literature or heard people talk about it widely.