Pew's report shows an increase in teens' willingness to share all sorts of demographic, contact, and location data. This is precisely the data that makes privacy advocates anxious. At the same time, their data show that teens are well-aware of privacy settings and have changed the defaults even if they don't choose to manage the accessibility of each content piece they share. They're also deleting friends (74%), deleting previous posts (59%), blocking people (58%), deleting comments (53%), detagging themselves (45%), and providing fake info (26%).
My favorite finding of Pew's is that 58% of teens cloak their messages either through inside jokes or other obscure references, with more older teens (62%) engaging in this practice than younger teens (46%). This is the practice that I've seen significantly rise since I first started doing work on teens' engagement with social media. It's the source of what Alice Marwick and I describe as "social steganography" in our paper on teen privacy practices.
While adults are often anxious about shared data that might be used by government agencies, advertisers, or evil older men, teens are much more attentive to those who hold immediate power over them -- parents, teachers, college admissions officers, army recruiters, etc….Most teens aren't worried about strangers; they're worried about getting in trouble.
Over the last few years, I've watched as teens have given up on controlling access to content. It's too hard, too frustrating, and technology simply can't fix the power issues. Instead, what they've been doing is focusing on controlling access to meaning. A comment might look like it means one thing, when in fact it means something quite different. By cloaking their accessible content, teens reclaim power over those who they know who are surveilling them. This practice is still only really emerging en masse, so I was delighted that Pew could put numbers to it. I should note that, as Instagram grows, I'm seeing more and more of this. A picture of a donut may not be about a donut. While adults worry about how teens' demographic data might be used, teens are becoming much more savvy at finding ways to encode their content and achieve privacy in public.