As an addition to that last question, about the Eygptian protestors, I also often wonder how different Mark Zuckerberg's positions on privacy, anonymity and identity would be if he were gay...
I mean what I say, but I can't rely on every stranger out there to treat me rationally afterward, so I intentionally limit who knows it was me. In venues like Facebook (and now linked forums), solely because I can't do that, I never say anything beyond the inoffensively vacuous when I bother to use them at all.
Unfortunately many people - even in the US - don't have this luxury. I saw the way the one person in my high school was brave enough to come out was ostracized, and given that I was already a target, I knew there was no way I could put up with what he had to go through. For Facebook to be working this hard to strip away the ability for people to have one image in public and another in private, well, it could end up hurting a lot of people.
Don't underestimate lengths people will go, to cover their inner feelings.
I really wonder what Zuckenberg's daddy and mommy issues are.