Submission + - Defense Distributed takedown was a forgery
Then things got interesting in an unexpected way. New Jersey's Attorney General office responded that they never actually sent the takedown notice to CloudFlare. Apparently, the IP address that was used to submit the takedown request was a proxy server in the Slovak republic.
So, while this doesn't provide a battleground on which Defense Distributed can fight for first amendment rights, it does point out some important flaws with requiring carriers to comply with (apparently) unauthenticated takedown requests.