Not if you are talking with someone not covered by the Constitution which its why we have FISA courts. Once they have access to anything they can and do read it maybe they can't use it in court but they certainly do use it to find ways to gather information they can use in court. Easier to find something if you know what it looks like.
The real power in DC today is in the hands of the person/people that have the black book of pedophiles that Maxwell has.
You are correct. It’s a backdoor approach to circumventing constitutional rights.