That was just part of the hysteria when the FAA announced registration.
The FAA is not posting the names and street addresses of registered owners because the data is exempt from disclosure under a FOIA exemption that protects information in agency files from a clearly unwarranted invasion of personal privacy.
The FAA based its determination to post only city, state and zip code on several factors, including, in part, that many of the registrants are minors and only hobbyists or recreational users. In addition, when the FAA published its Federal Register notice pertaining to the new unmanned aircraft registration system it specifically advised the public that name and addresses would only be available by the registration number issued to the registrant. For these reasons, the FAA believes the privacy interest in such data outweighs any public interest.
Click here to see the actual database:
http://www.faa.gov/foia/electronic_reading_room/media/Reg-by-City-State-Zip-12May2016.xlsx