I don't use a facebook and have seen no practical consequence. I do miss people's birthdays but frankly, with 500+ friends, odds are I would have forgotten to wish them a happy birthday anyway. Doesn't mean much to just post it on their wall. Below there are some comments saying that employers will look at the lack of a facebook as a warning sign. I can't say I'm an expert on the topic, but I've personally never encountered anything of the sort. No employer has ever asked me for my facebook and I doubt they have the time to look everyone up with hundreds of job applications anyway. In fact, I've seen the opposite. Not having a facebook is seen as some of my friends as being hip and cool. I'm not saying I'm fond of this behavior, but I have heard some people say things like, "Oh, yeah, I don't use Facebook. I feel like it devalues human interaction, you know?" And then they start talking about the latest bands no one has heard of :) Basically, what I'm trying to say is that my life without Facebook is nothing but sunshine and kittens. Come on over! Grass is greener and you get more done!