As someone who enjoys shooting (targets not people), I hope I never, ever have to pull the trigger in defense of my family.

I see both side to the argument about 3d printed guns. Now, I see no issue with someone designing them and printing them, it is the person holding the gun that is responsible, not the maker, designer, seller, etc. (and I mean legal, not illegal). Argument that it can be used to kill people - sure it could but so can that printed knife - which by the way is actually easier to hide as you can print it with no metal parts.

People say that it is immoral or unethical to publish / design - whatever for the gun. Yes, it is illegal in some countries but then again so is pornography. A design / print of a naked woman, body part, etc. would be illegal in many countries (I've been to them) - Warfairy lives in one. How many would argue that posting a print file for a naked woman is immoral or unethical? Can't hurt anyone with it (I guess you could but would be harder) but there are still issues with having it in many areas. Sadly in the US, this would more likely cause legislation for 3d printers than guns (we are backwards in some ways).

In the end, if someone wants to get a gun, knife they are going to be able to get one. It doesn't matter how. If they want all they really need is a metal tube, nail, and a hammer (might not be accurate but it will work).

Posting the design doesn't matter. Someone that wants can now take pictures of parts, turn them into a model and print. Might take a little trial and error but I'm sure there are plenty that could make a working gun that way.

Enough rambling. People all over the world just need to get back to respecting each other, there is too much hate.