I often browse /r/4chan and I have to admit than even though 4chan is not a website I often go to or use at all, it seems like it's a much more attractive and fun place to go to.
I really don't understand the point of stating your real identity on a social media. Internet security is already not perfect to this day, so what's the point? Facebook doesn't even let you meet new people outside your network, or even interact with friends of your friends in a trustful manner.
4chan is like the local pub, facebook is like a bar where everyone has their name and interests written on their face. Evidently 4chan seems more natural.