Recently, the U.S. federal government settled a landmark case.
Back in 2013, with the advent of mainstream 3-D printing technology, Texan Cody Wilson came up with a way to literally print a working firearm (if the necessary metal components were added). He made the schematic free on the internet.
Within days (but after 100,000 downloads), the federal government ordered the plans taken offline. Wilson obeyed but sued the government for infringement of First (and Second) amendment rights.
Under the terms of the settlement, he won.
In response, Wilson tweeted an image of a gravestone marked "American Gun Control."
It's hard to not believe him, and this specific issue of gun control is in line with a host of others that will need to be reassessed with new technologies.
It's long been understood that when there's a social ill, the government should impose a law to curb the occurrences of the ill. The problem with this system today is that technology is undermining the power of law — in increasing fashion.
Three-dimensional printing is just one technology weakening the power of governments.