There is not enough information in this article to make an informed opinion as to who is "more at fault". After reading the immature comment, it could easily be said that the "idiot" was the person who has been watching movies like Gotcha and thought it would be a good idea to chase people around a crowded public space with realistic looking airsoft guns. Until more detailed information is provided there is no way to make an educated opinion of the "adult's" actions.