Gun control and the copy left

After reading yet another article about how 3-D printers threaten to make gun control obsolete I started to wonder: Will this issue blast a division in the pro-piracy, anti-copyright, Wikileaks-supporting Aaron Swartz-mourning community?

I associate the anti-gun control mindset with an older, more rural demographic than the young tech-savvy student demographic that wants file sharing to be unheeded and the two have little overlap. How would they handle this situation when files to make weapons get shared in 3-D printer collections?

I doubt they would be willing to turn to the authorities and risk having their whole ecosystem shut down. Would it be self-policing? I imagine that's how they handle child pornography now.

Does anyone have any insight on this inevitable issue?