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.
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.
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.
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.