There are, and quite a lot of them. You see, a totally unregulated market like this cannot bring only good things to the table. While I do not agree with most mass media alarmist press that states the 3d printers will bring the apocalypse, I consider that there are some risks associated with giving people technology that can create everything.
And printing 3D guns is not the main issue here, it’s just one of the issues.
I do not agree with everything al-Jazeera says in that video, but they do make a point even if it’s not the greatest one.
This guy here gives an impressive TED speech on an adjacent matter that you have to check out.