I use social networking in two countries, Taiwan and Germany, and less than half of my contacts use their "passport name" on FB. Almost none of my contacts are hackers.

In fact, only the hackers I know use their real names online because they're freelancers and build a presence. I wonder if that leads to the assumption among hackers that only weirdos would ever need this feature. Stating that only n% of n% of n% would ever need privacy actually sounds even more insulting than just calling us "weirdos".