This brings up a really good point. Being in my early 20's and in college, I have many friends who have a strict policy of not friending family on Facebook or going by a pseudonym because they don't want their parents seeing all the picture of them partying etc.
I wonder if FB had implemented a feature like G+'s circles, if this wouldn't be an issue.
You do but privacy policies and what who can see on whose time line keeps changing. Timelines haven't always been a thing either. So if you've used facebook for a while, the incoherent and mercurial scope of information prevents you from wanting to share anything that could be misinterpreted by anyone. And you have to assume that everything will be scraped somewhere for all of eternity.
Facebook has messed with the privacy settings enough that people who are watching what they are doing don't trust them. For people who aren't paying attention, the privacy settings are too confusing to trust.
Snapchat? Recipient views picture once, and if they try to save it you know.
I wonder if FB had implemented a feature like G+'s circles, if this wouldn't be an issue.