Or maybe yet another reason for people to get their shit together.
Seriously, this is not an issue of privacy - it's an issue of society potentially overreacting to things. So Jane Doe watches porn. Big deal. John Doe watches it too. Like 80% of country's population. It's an open secret, like going to shrink used to be. It only holds power over you if you expect people around you to behave like apes (which they often do - see being gay 30 years ago, or being not pro-gay now).
I know very well that it's easier to influence tech than society; hell, it's even easier to influence biological factors than social ones. But ultimately, we can't blame it on tech when it's lack of civility that's the problem. Maybe it's the very expectation of privacy that makes people such bigots?
Either way, it's another data point for "privacy vs. progress of mankind, pick one".