This is really wonderful work by the EFF. Legal opinions are not dangerous. They don't disclose the locations of undercover agents or anything like that. It's a contempt to the legal profession to keep them secret so that their reasoning cannot be scrutinized by courts. A lawyer's job is to make the best possible argument for her client's position, but if the court says she's wrong--and it's within the court's sole provenance to say what the law is--then she must acquiesce.