It's a piece in IEEE Spectrum, lots of people submit articles there.
With respect to unconstitutionality, really? Are you also able to acquire and keep on your property a functioning ICBM or nuclear bomb? Arms controls exist in the US despite the 2nd amendment.
Considering that the technology to build such drones is so widely available there's no reason why small arm drones wouldn't be protected under the 2nd amendment. Drones with bombs are a different story, but will be developed regardless of any international agreement (just like bio weapons).
With respect to unconstitutionality, really? Are you also able to acquire and keep on your property a functioning ICBM or nuclear bomb? Arms controls exist in the US despite the 2nd amendment.