I don't think he/she is referring to Miranda, but GCHQ's arbitrary espionage on citizens, interception of communications, etc., borderline legal, if not illegal

I don't think he/she is referring to Miranda, but GCHQ's arbitrary espionage on citizens, interception of communications, etc., borderline legal, if not illegal. Although the Miranda detention is the story here, the real story is the NSA/GCHQ massive surveillance revelation.