Something like that happened recently in Vienna. A 14-year old girl killed her mother with a knife because she had forbidden her to surf the Internet.
Here's a link: http://www.monstersandcritics.com/news/europe/news/article_1548138.php/Viennese-girl-kills-mother-after-internet-ban
Here's a link: http://www.monstersandcritics.com/news/europe/news/article_1548138.php/Viennese-girl-kills-mother-after-internet-ban