Private 3D printers make it impossible to regulate illegal products  As the technology develops, it seems likely that guns like the one created by Defense Distributed will continue to appear, becoming cheaper, more functional and more accessible. While the US succeeded in promptly removing the blueprints, removing blueprints from the internet will quickly prove impossible as the phenomenon inevitably becomes more widespread.5  This is dangerous for all the same reasons that we do not allow people to produce their own weapons: we cannot ensure criminals or mentally ill people do not gain access to them, and we cannot track them after they have been used to commit a crime. Furthermore, they can be made of plastic, thus making them essentially undetectable to most security scans. When weapons become so easily accessible, crimes become easier for terrorists or criminals to commit, and thus more crimes take place. By banning printers before blueprints spread, we could avoid disasters such as the 2004 bombings in Madrid, in which the bombs were produced from instructions on the internet6.  Similarly, the production of drugs and other illegal substances becomes impossible to regulate when anybody can produce anything in their own homes from plans on the internet. Restricting the spread of blueprints online is impossible, so the physical means of production must be regulated before they become irreversibly accessible. Banning household 3D printers, therefore, is a necessary step to uphold the rules we find important to our safety.  [5] Winter, Jana. “Homeland Security bulletin warns 3D-printed guns may be ‘impossible’ to stop”, FoxNews.com, Fox News. 23 May 2013.   [6] “Online University: Jihad 101 for Would-Be Terrorists”, Spiegel Online International. 17 August 2006.