The irony is, if you crunch the numbers, you'll find that the total noncompliance rate of the PTC study for 2010 is actually 15%. Last time I checked, 15% is less than 20%, right?
There is a simple, but important, flaw in Julie Peasgood's logic (or lack there of) that she seems to have overlooked: If video games do cause us to become emotionless killing machines, then the first people we would most likely off would be those like, well, Julie Peasgood.