I don't know joshstrange or his circle of friends but since I experience zero stigma of not being on Facebook, it seems to be highly depended on one's particular peer group.

If I think of the 5 people I regularly interact with, none of them have Facebook accounts. Therefore, it's not strange that I don't have Facebook. The topic never comes up. However, some of the guys' wives have Facebook accounts so in some sense, the female spouses act as the "Facebook gateway" to the outside world. I chuckle at this state of affairs because it seems to duplicate the exact situation of the yesteryear where the husbands engrossed in the newspaper/tv always ignored the ringing landline phone and let the wife answer it.

If it makes you feel better, a lot of celebrities (including some under age 30) don't use Facebook either. There are various articles listing names: https://www.google.com/search?q=celebrities+not+on+facebook