But that's not the point, is it? Privacy is not about asking people to "unhear". Privacy is about people not putting effort in trying to discover what is none of their business, or presenting bullshit claims that it is "supposedly" their business to know, or that they are allowed to decide what your intentions are and therefore they "need to know".

I would not argue they must be oblivious or cripple their senses. I would argue that they have no right to demand info they aren't privileged to.