Video games and violence

According to a story on the Washington Post web site December 17th, a study of game sales per capita and gun-related murders per capita in 10 countries shows no real correlation. At the end, there’s a graph showing a linear fit through the data, showing a weak negative correlation, but as scattered as the data is, even drawing that line makes no sense to me. None the less, it certainly doesn’t look like correlation (much less causation) between the two.