In theory they can challenge in FISA court yes, FISA court has denied less than 0.1% of the warrant requests in 30+ year history. It is rubber stamp court. I a

In theory they can challenge in FISA court yes, FISA court has denied less than 0.1% of the warrant requests in 30+ year history. It is rubber stamp court. I am sure such rubber stamp processes exist in China as well. The fact you cannot even mention that you received a NSL forget the scope and nature of actual request, and entire secretive nature of the court proceedings and no plans to every unseal this data, canary declaration being the only way to even tell your customers. If I said this happened anywhere else you will say that country is repressive.