I agree with you.
Unless some kind of punishment is given to the boy then I wonder how long it will be before some copycat thinks it's the best idea ever to try something like this.
I would expect the mother to pay for at least some of the costs involved, but lets face it, the press will take her side and no doubt Jet2 will be made to look like an evil airline if they even attempt to take action against the boy or his careless mother.