The "Violence Policy Center" thinks there's a sniper subculture? Encouraged and fueled by manufacturers of "military-style weapons"?
I think that depends on how you define subculture. This seems to require us to define it as "any identifiable demographic that buys things you wouldn't buy yourself." I think there's a simpler answer.
Reminds me of my days working retail bookselling. We carried a handful of those stupid "how to be a ninja" books, but to my knowledge we never actually sold one. They kept getting shoplifted. I now recognize I should have been blaming the "ninja subculture" instead of the pimply-faced adolescent guys that appeared to be responsible.
(Saw it at Instapundit: Didn't everybody?)