http://boingboing.net/2011/09/20/3d-printed-ar-15-parts-chal...
One would hope that self-driving cars will have their driving system disconnected from any networks, but I don't know if that's even practical.
It isn't, except in as much as you can program it to follow a flight-path and then clear off. Given that you don't need to be in wireless range (200 meters?) you could send the drone in from miles away. But that aside: your comment is rational, but I wouldn't rely on politicians being so faced with scare stories about these exciting new technologies. Allied to their usual technophobia, they will try to ban everything, or require licences with onerous conditions.
everyone with a key is considered suspect. EFF suggest you walk around with several keys to your neighbors houses to enable a doubt defense.
Feds waste millions of tax dollars on 3D printers crackdowns trhu the country, since they can't be used for anything else other than pirating handcuffs keys copyrighted material. Seizes thingverse servers and demand CEO extradition.
They are in basic form, the first generation of digital replicators and some of the open source variants are already under $500, with dirt cheap print costs.
Who only knows what the patent industry is going to do, because certain sections of it are now screwed far, far worse than the recording and distribution industry ever was over people downloading MP3s, especially given that the mashup and resharing of different objects will probably be an extremely common use of desktop manufacture-to-order technologies and is easily accomplished over many existing and popular MMORPGs, alongside all the standard web channels, so is an absolute nightmare to try and police.
And that's without even considering the issues raised by laser scanning, photographic 3d, or just artists with a good eye and memory.