I'm not sure this is the sentence you meant. Of course anybody can listen in when you have no expectation of privacy. Without a court ordered search warrant, they can't listen in when you do have expectation of privacy.
Facebook is not private, neither is Twitter, especially not the profiles on Facebook.
You can have whatever wishes you want, but if you are behaving inconsistently with the truth, you're going to spend a lot of time being wrong and having your wishes disobeyed.