Maybe these people are taking pictures for the sake of having memories? God forbid someone else wants to remember specific moments of their life.
Wait, what's that? They POSTED them on a website designed for posting pictures of your life? Wow, what ****ing attention-craving *****s.
And, even more, YOU went on a website that's designed for people to post things about your life, and are complaining that people do so? Because there are soooo many more important things for you to do on facebook?