[colincsl]

That really isn't very surprising given that most people don't have a need for a passport. I can't imagine most Americans traveling out of the country within a 10 year span, whereas anyone can easily sign up with a Facebook account.

I wish it was better cited. I'm hesitant to believe some of the information. For example, it claims that 45% of people visit friends abroad because of Facebook. Perhaps people in other places (ie Europe where it is cheaper to go between countries) travel abroad regularly, but I don't know anyone in the US who has gone to another country because of Facebook.