I use pretty much every social media site out there, including Google Plus, Facebook, Flickr, WordPress, Tumblr, and Twitter.
A lot of what I post to these sites is private, however, or at least very limited in terms of access (usually limited to close family and friends). A lot of this private content includes photos and videos.
Based on the security settings of these various sites, I’d always understood that content privacy was consummate. If, for example, I post a photo, I expect that photo to be completely contained within that privacy model.
But that’s not so. It turns out that photos posted to every social media site are published to the web in a completely exposed state. Only if you attempt to access the file through the web site is it protected. If you try to access the media file directly, it’s open to anyone.