So a certain study finds a correlation, or says there's one, and it's published. The media picks it up, explaining the (science-approved!) dangers of these games, and the debate gets even more polarized. But if one study finds a correlation, it's not the last word (or vice versa). Both sides of the debate can go to battle armed with studies, even if the evidence on either side is weak at best. And even with the shield of peer review, scientists aren't immune to falling into an advocacy camp. The media picks up those individual studies without looking at the big picture, more scientists drop back into corners, and the debate continues without any kind of clarity brought to the table.