The first connotation is the one my mother warned me about. It's Facebook photos of that tequila weekend in Tijuana and those two PM Tuesday tweets from the beach bar when I called in sick to work. These are things that require personal judgement in regard to what I say. Self-control addresses this type of privacy.
The second connotation of privacy is newer, but still nearly twenty years old. It entails concerns regarding information collected about my actions beyond what I explicitly choose to broadcast. It's cookies in the browser [and their more sophisticated descendants]. It's my browser linking my Google+ account to my browsing history at lesbiandwarffurries.com.
Privacy issues of this second type are assumed to be normal when they are considered at all - why doesn't my browser sandbox cookies for each website? Or rather why isn't there a browser that does so? The same logic underpins the Blackphone - sand boxing unrelated parts of the system so that privacy is a matter of personal judgement rather a battle against a technically sophisticated adversary.
