In discussions of all kinds of topics, the notion of invasion of privacy can often come up, and it is usually invoked as something which is matter-of-factly wrong, with no further arguments presented as to why.
My question is, is this stance the correct stance? That is, is (uninvited) invasion of privacy necessarily and fundamentally a bad thing, and if so, why?
Imagine, for example, two people, A and B. They have nothing to do with each other, will never interact in their lives, or have any sort of relationship whatsoever, nor do they wish to do the other any sort of harm. The relationship is entirely neutral. However, A has access to all the information available to B (including private information), and vice versa.
Why is that a bad thing?
Note that above scenario is obviously unrealistic, since in real-life, people aren't neutral, and often do wish to exploit others' private info, and yes, I am for that reason totally against privacy invasion such as government surveillance and the like. But in this question, I am talking about privacy invasion in and of itself, with a complete disregard of ulterior motives of humans.