How would you know anyway?
For all of theses last few decades of modern communications, someone could easily spy on you. Making it legal for law enforcement under certain cir stances does not man someone with access didn't abuse the system before. If someone has unethical intent, do you think the law matters to them?
That like declaring a "Gun Free Zone" so criminals will put away their guns. They do it anyway.
In the late 80's, the AT&T DACS frame I worked on could monitor any conversation anywhere on the digital system, if you knew the right access codes. Now, everything is on digital switching frames. Legal or not, it can be done. I'm more worried about the ethics of people who have access. Not the legality of it.