The canary trick is roughly on par with "I was NOT served a letter on July 20, 2013, which did NOT say the following..."
To be honest, I'm even a little nervous that something as innocuous as "I wish I could tell you more about the circumstances leading to the decision" could be seen as communicating the presence of an NSL indirectly, and lead to contempt of court.
To be honest, I'm even a little nervous that something as innocuous as "I wish I could tell you more about the circumstances leading to the decision" could be seen as communicating the presence of an NSL indirectly, and lead to contempt of court.