Thompson has heavily criticized a number of video games and campaigned against their producers and distributors. His basic argument is that violent video games have repeatedly been used by teenagers as "murder simulators" to rehearse violent plans. He has pointed to alleged connections between such games and a number of school massacres. According to Thompson, "In every school shooting, we find that kids who pull the trigger are video gamers." Also, he claims that scientific studies show teenagers process the game environment differently from adults, leading to increased violence and copycat behavior. According to Thompson, "If some wacked-out adult wants to spend his time playing "", one has to wonder why he doesn't get a life, but when it comes to kids, it has a demonstrable impact on their behavior and the development of the frontal lobes of their brain." Thompson has described the proliferation of games by Sony, a Japanese company, as "Pearl Harbor 2". According to Thompson, "Many parents think that stores won't sell an M-rated game to someone under 17. We know that's not true, and, in fact, kids roughly 50 percent of that time, all the studies show, are able to walk into any store and get any game regardless of the rating, no questions asked."