
The Second Law of Thermodynamics states that the total entropy of a system – the amount of disorder – only ever increases. In other words, the amount of order only ever decreases.
Privacy is similar to entropy. Privacy is only ever decreasing. Privacy is not something you can take back. I cannot take back from you the knowledge that I sing Abba songs badly in the shower. Just as you can’t take back from me the fact that I found out about how you vote.