If FISA makes it illegal to discuss who is getting threatened via secret court orders, how would you remotely know if there are or aren't any chilling affects?

If FISA makes it illegal to discuss who is getting threatened via secret court orders, how would you remotely know if there are or aren't any chilling affects? This is an important part of this argument. When we make it illegal to discuss the crime, the warrant, and have secret court proceedings, you can't just sit there on your high horse and tell us there is no abuse. You are not allowed to know of any abuse.