The fear of logging on to Facebook, or creating an account. Stems from the fear of being judged by others, exposing your private life or having too few friends to add (and thus embarrassing the friends you already have).
Jess: "Sara said she's not on Facebook because she rejects the principles of mass consumerism and the resulting strife for self legitimization."
Jill: "Fail, thats fabophobia! She just doesn't have any friends to add!"