Three-D Printer prints a gun

And even Fox TV news thinks this is horrible.  They had a cop explaining the horror of guns without serial numbers.  Untraceable.  And being all plastic they will go thru airport metal detectors.  End of civilization.  Let's ban 'em.
   This from Fox News.  I hate to think what MSNBC is saying.
   Let's be real.  I can buy a brand new handgun from the likes of Colt, Smith & Wesson, or Ruger for $500-$600.  That's new, top of the line.  Used, bottom of the line they are cheaper.  The 3-D printers  cost three or four times that, even for a home hobby shop model that only does plastic.  Best future development of 3-D printers, brings the cost down to that of an office laser printer.  In 30 years that is.  Laser printers have been on the market for thirty years and they are still too expensive for home use.  Us home hobbyshoppers use inkjet printers. 
   Whereas the utility of 3-D printers for inventors, new product development, making unavailable parts for old and out-of-production machines and appliances, doing artwork, making Christmas tree ornaments, jewelry, fancy furniture hardware, and knickknacks is undeniable, and ought to be encouraged.  If we let BATFE "regulate" 3-D printers, they will load 'em down with so much paperwork that nobody can afford 'em.
   The cop's argument about serial numbers is ridiculous.  A Dremel tool will zip the serial numbers off a gun (or anything else) in seconds.  Plastic guns going thru metal detectors is bogus too.  Air travel would be safer if the passengers carried heat.  For that matter, I don't believe all that plastic gun talk.  They been talking about them for years, but I have never seen one.  Even Glock, which has a plastic frame, still has a steel barrel.