When discussing new laws that give government agencies greater powers in relation to surveillance, people sometimes claim, "If you haven't done anything wrong, then you shouldn't have anything to hide." This doesn't sit right with me, but I find my disquiet difficult to explain. It's not that I'm worried about bad governments potentially abusing such powers; it's more that I feel some sort of violation has happened.
In a very different context, when people reveal their inmost thoughts on social media, or even post nude photographs of themselves, it's sometimes said, "This is who I am. Why should I hide anything or keep anything secret?" Again, I'd suggest that the value of some sort of privacy or private space is being questioned. There's a sort of implicit challenge as to why anyone should be private at all.
I was wondering whether philosophers have any good reasons why some sort of secret, private space should be valued in itself. If one is not a criminal, is there any reason not to live one's life completely open?