I’ve run into this argument many times talking about privacy of personal information seriously.
“Who cares! I’ve got nothing to hide. Go ahead and read my emails”
“Show me your wallet”
“Who cares! You’ve got nothing to hide”
If they are dumb enough to give me their wallet, I proceed to pull everything out of it and start photographing it with my phone camera.
“What are you doing? Stop it!”
“That’s none of your business. What are you going to do with that?”
“You said you don’t care. Are you saying that you don’t want me to photograph the complete contents of your wallet every time I see you?”
“Then you ARE concerned about privacy?”