"I love how people (including the author) are jumping all over the mom on this.
"Sure, she has a truck for her 15-year-old, but the kid has to learn to drive eventually, and what better way to do it than NOT in your own vehicle?
"As for the public shaming part, we as parents can't just slap reason into our children, so this would be just as effective a way to do it, imo. Maybe not with the whole backstory, but I could see selling off the truck.
"Personally, I would have started with the kid's cell phone (which you KNOW she has one) and worked up... but maybe this mom did, and the kid is still being a giant nutfilled turd. We don't know the whole story.
"As a father, I raise my kids to be respectful of other people and myself, so if one of my daughters were to be a disrespectful little shit, I would not hesitate to sell off their vehicle to get their full attention."