What are the possible motives behind the 9 year old fake kidnapping story?

One possible motive could be for a prank. People might want to give their friends or family a big scare and then have a good laugh about it later. For example, like the stories where friends plan a fake abduction to surprise the victim with a party or some other fun event.

One possible motive could be financial gain. The kidnappers might have planned to demand a large ransom from the victims' families.

Some may create a 'homeless kid fake story' to gain attention. They want others to think they are kind - hearted or to make themselves look important in the eyes of others.

Perhaps it's about love in a twisted way. Sebastian might be obsessed with Clary and think that by kidnapping her, he can make her his. In some fanfictions, characters with a warped sense of love do extreme things like this. He could also be trying to use Clary as a pawn in a larger scheme against the Shadowhunters. By having her in his control, he can manipulate the situation to his advantage.

One possible motive could be misinformation. Maybe Bucky was misled to believe the OC was a threat to someone he cares about. So, he kidnapped the OC to prevent them from causing harm.

Maybe Dumbledore believes that Harry has some hidden power that is being corrupted by the environment at Hogwarts. So, he kidnaps Harry to a secluded place to train him and help him control this power without any distractions or negative influences from other students or even some of the teachers.

I'm not sure specifically which '9 year old fake kidnapping story' you're referring to. There could be many such stories in different places. Maybe it was a case where someone made up a kidnapping for attention or some other malicious reason.

It could also be a personal vendetta. Maybe she had some sort of conflict with someone in the past, and that person decided to kidnap her as revenge. For example, if she had testified against someone in a court case, the person might want to get back at her.

Maybe for personal fame or attention. The person who made up the story might have thought that they would get noticed if they spread such an interesting - sounding false story. Another reason could be to mislead competitors if there are any adventure - related competitions or activities in the area. They might want to throw others off by creating this false narrative about a lost woman in the mountains.

One possible motive could be to create chaos in the school community. Some people might want to disrupt the normal functioning of the school.