The posts usually go something like this. "I just don't understand how an *average teenager* could afford these guns." Thats the key phrase they keep using "average teenager", like anyone at any time, could become a mass shooter. Every responsible gun owner knows not only is this not the case, but there are many many teenagers that own and use rifles. Which tells you the people posting these comments are 1. not gun owners, 2. are ignorant about firearms, 3. and/or have an agenda. Caught dead to rights spreading propaganda. Document every user posting and commenting this line, because knowing who the shills are will allow you to better see how they work down the line.