Take my scenario of water. Water purification really came online in this country at about the same time as video games hit the market. So maybe video games took the place of contaminated water in causing mental instability that leads to shootings.
You certainly don't have the data to prove that isn't a possibility.
If you don't have data that shows a link, you can't prove correlation or causality. The thread is based upon an assumption of a link between games and increased mass murder. The data on mass murder does not support this assumption, (i.e., mass murders have not increased), so the assumption cannot be supported and is rendered impotent for the purposes of discussion.
Foxfyre should feel intellectual responsibility for proving her affirmative claims, which she has not done. And, I am not required to prove a negative, merely to show that her positive assertions are not supported by data.
Personally, I think there is some merit to charge that video games are unhealthy for kids who are fucked up to begin with. The same as guns are unhealthy for those kids.
The argument, established by foxfyre, in the initial thread, is that there has been an escalation of mass murder, and that this escalation was caused by exposure to violent video games.
There hasn't been an escalation of mass murder. Thus, her claim is moot.