Rocketman wrote:Should I assume these people have not read between the lines very well?
Yes, thats the least you should assume. Not actually paid any attention at all would be more like it.
Maybe start by asking have they banned Mobile Phones, Pressure Cookers, Nuts, Bolts, Fertilizer, hydrogen peroxide, or any of the other commonly available household items that can make IED's.
Have they banned metal mills and lathes, of which can make existing guns, quite easily actually... as much 'ease' as there is in getting a succesful print that would work reliably anyway... and can be bought just as cheaply and 'used' just as 'easily'....
Distribution of Gun Print Plans is covered under a regulation called ITAR (International Trade in Arms Regulations). Its the same rules that cover export of 'real' guns etc. These are existing laws that actually cover what happened here quite well.
3D Printers themselves... nothing, nada, zip, zippo..... No laws, no rules, nothing that can be 'enforced'. And as pointed out above, theres virtually zero motivation that could cause them to be banned given that Metal Mills and Lathes are widely available to the public still are they not? 
So nutshell version.... Storm, meet teacup.... 