Joanie could also be a minor character from another related story or even from a different part of the Hawaii 5 0 universe that has been given a more central role in this fanfiction. Maybe she was a bystander in some events in the show and now she's taking matters into her own hands for reasons yet to be fully explored. She could be a disgruntled ex - employee of a place that was often used as a filming location for the show, and that's why she's lashing out at a fan.
Well, one possibility could be that Joanie has some sort of vendetta against a character in Hawaii 5 0. Maybe she's been wronged in the past by someone related to the show's world. So, she kidnaps a fan to get the attention of the people in the show, perhaps to force them to right the wrong that was done to her.
It depends. Some elements might be inspired by real events, but it's likely a fictional story with elements of drama and suspense added for entertainment.
Yes, 'A Thursday' is based on a real - life inspired story. It often takes real - world events or concepts as a foundation to build its narrative, which makes it a thought - provoking piece of work.