3D-printing must be stopped now while it is in its infancy. Otherwise, America will be destroyed. How? Think about it. If people can simply "print" everything that they need or want, then they will stop going to stores. Businesses will fail, unemployment will skyrocket, and money will become worthless. The people will overthrow the government in a fit of rage, and anarchy will reign.
I don't know about you, but that doesn't sound very appealing to me.
Sometimes technology must be destroyed before it can destroy us.