Also there's like millions of people on anti-depressants. People that would randomly shoot someone is probably depressed and probably taking meds for it. Correlation=\= causation
A HUGE part of the problem is the mental state of our country. People are soft, and coddled from an early age and, if they ever have any kind of behavioral or socialization problem, they are slapped on some sort of chemical instead of trying to identify the root cause.
Hell, most of the root cause of true genetic chemical imbalances can also probably be linked to the preservatives and other chemicals we are constantly exposed to on a daily basis.
But no. Let's fug up the environment. Let's slap your kids on "behavioral modification" drugs. Let's let the TV, pop culture, and video games be our baby sitters. Consume, consume, consume.
Then, when something bad happens, let's look for a scapegoat other than our own sh!tty human existence and blame things that we can tax, regulate, control, and make even more money for our empire on.
Fϋck responsibility for anything. Let's disregard the obvious bigger problem to serve our personal agendas.