I admit I probably have a gloomy outlook on privacy in the 21st century, but I'm certainly not alone in that. While bills get shuffled around in Washington D.C., though, the honest truth is that we aren't very proactive in protecting our personal information anyway.
This was the larger point of the lecture by Steven Rambam, Privacy Is Dead. As a private investigator, Rambam has keen insight on how we share our personal information through social media - because he has used it as a major source for some time now. Although his lecture was focused on bringing to light how slack we can be online, the lecture title sums it all up pretty nicely.
The short version is that the cat is already out of the bag.