I like to counter the "If you have done nothing wrong then you have nothing to hide" argument with...
"If I have done nothing wrong, then no one has the need to take an interest in my personal affairs."
"If I have done nothing wrong, then no one has the need to take an interest in my personal affairs."
If someone is arguing for dragnet surveillance with the idea that it only really impacts the guilty, and you respond by pointing out that you're innocent so there's nothing to gain by surveilling you, you haven't refuted their position at all.
edit I see we're retreading an exchange (between others) from a few months back: https://news.ycombinator.com/item?id=23709602
And I would assume most people have things they would rather other people or government not know about.
Everyone has secrets they want to keep.
But we don't know that you have done nothing wrong. Why don't we just take a quick peek and we'll leave you alone until we randomly decide to do this pointless exercise again?