I'd rather suspect that one of the ARF.com members would NOT be the one on the rampage or going postal...
Based upon the demographic polls taken on this site, ie; Bachelor degree education or better, soft spoke, thoughtful types, I would see an ARF.com member being the one who STOPPED the idiot who was on the rampage by being the only person in the vicinity with immediate access to a firearm and the skill and courage to use it properly, thus saving countless innocent lives of others caught in the same predicament. Past cases show that most rampage shooters are "Berserkers" who spray-and-pray, after no one in particular and shooting "To whom it may concern" choosing a few selected targets and then as many as they can hit while shooting wildly.
"Stand your ground, look 'em in the eye, and shoot the bastard" -sheriff Bill Jordan